These things are awesome! I've actually never been able to keep my hair in a bun without the spin pins, my hair just falls out no matter how many bobby pins and hair spray I used. They're so easy to use (and fun!), they don't damage hair at all, they stay twisted alllll day and are invisible. I have blonde hair so the brassy colour works for me, but if they haven't already, they should make some for each hair colour. I will buy them again once I loose these ones!

I have thick, curly hair that bobby pins just aren't strong enough for without having to use more than 25 for a simple up-do. With these I needed only two and they held trough a wedding and LOTS of dancing. That was when I had hair just past my shoulders, now that it's longer I think I'll grab another package just for the extra security while dancing, though I'm not entirely sure I need them.

I purchased this hoping that if I use these pins, I wouldn't have to use 2+ hair ties (it takes at least 2 hair ties, no bobby pins, to hold my hair into a chignon bun). Well, I actually do need to use a hair tie with these pins. I have layered hair, so after using BOTH of these pins on a chignon, there are still one or two chunks of hair that stick out, so I have to use a hair tie to secure them. <--Which kind of defeats the purpose of me purchasing Spin Pins in the first place, but oh well. Regardless, these are still really handy pins. My friends saw me use them and they were like, "omfg those are so cool!" And they ARE cool. The whole concept is unbelievably genius.
All you have to do is twist/screw them in your hair. And don't worry, it won't show (as long as you screw it in all the way) because the finish is matte. If you have thin, unlayered hair, you only need one pin. If you have thick, layered hair like mine, you need both pins and probably an additional hair tie or bobby pins.
For $7, they're pretty expensive considering it only comes with two pins, but I think I'm used to seeing overpriced stuff, especially in drugstores when it comes to makeup and hair products.
I purchased this in Dark Hair, since I have medium-to-dark brown hair. Dark Hair is actually more like a medium brown than dark brown or black like it should be. It also comes in Blonde.
Would I repurchase? Yes. continued >>

I couldn't believe the amount of people who would buy this again! Ok, so this will work if you have the right hair type/texture/length. But unfortunately on me, it does not work. I have long, layered, silky, normal to thick hair and this doesn't keep my hair up. If I use these spin pins, this is what I do: put hair up in a ponytail with an elastic, twist hair into bun, insert spin pins, grab 4 bobby pins and secure bun. After doing this, then MAYBE it will stay up all day.

With this stuff it takes you less than a minute to make an up do and it will not only be a very comfortable one but also last the whole day (even in the gym!).
You can do everything from a very simple quick up-do, french twist, messy bun to the most complicated creations that you might think would never stay in your hair. Spin Pins stay, they won't budge until you want to spin them out. Easy and pain-free. Genius!

I don't actually have the Goody brand spin pins, mine are just plain black from an unknown brand and costs 20 Danish kr (about $3,50) for a pair.
I have fine wavy hair, but tons of it, and I've never been able to do my hair with any kind of bobby pins - I've tried in every which way, but they bounce right out of my hair within 15 minutes. Enter the spin pins.

I now put my hair in top buns, braided buns, messy buns and everything in between every week, and I love it! I've also created a cult around this at my study, every girl who has seen me put my hair up with these went home and bought them, after the initial "What on earth is that??", haha!
I will never be without these, my HG of hair products.

This product singlehandedly (1) elevated my relationship with my ailing mother-in-law, who could continue to work her French twist even after surgery left her weak; (2) made my dad-in-law very proud to know he could help with her hair ("why haven't these been invented before now?"); and (3) made my sis-in-law burn silently in a corner, I guess because I dared introduce a product about which she knew nothing (because, you see, she knows EVERYTHING about anything worth knowing) and for which her mother was very grateful indeed. Oh, and I keep plenty around for twists and buns in my own hair as well. I have no complaints. Lovely invention.

[Update-of-sorts (4/2012): Wow. What's up with all the thumb-feedback? It doesn't matter one way or the other, but I don't get it (shrug). The pins remain extremely easy to use, particularly for one seeking and/or less knowledgeable about working a French twist without a lot of bobby pins. Frankly, I use them most often to fix my hair up and away from my neck while I sleep. Mom's hair is mostly collar-length and coarse; mine is shoulder-length (right now), 2b/3a, fine, and slightly prone to breakage.]

I adore these dang things. I have fine, wavy, thin, and layered hair. These hold it very well at many stages of length. They're great for holding a secure bun while I'm at work, but they also work well for sweet, messy styles -- like a wavy & loose romantic low chignon. I've found so many uses for these and they've worn well for me. I found them easy to learn to use. One of my favourite things. I wear them all the time. continued >>

What a great way to get your hair up easily. I've been growing out a short haircut, and haven't had my hair cut in nearly a year now (wow how time flies). These are great for in-between cuts, or if you're a long-haired girl, just creating a quick and elegant hairstyle. Highly recommended!

I've never been very good at putting up my own hair and have always envied those girls who could seemingly roll a neat chignon whilst simultaneously dressing (perfectly) for a day at the office. Well, these might not turn me into *that* woman (if only!) but they are quick, easy to use and they work really well on my long, fine (but plentiful) hair, allowing me to create the neat or messy bun I desire. I tend to need to use 3 pins (so I had to buy 2 packs) but that might just be because I'm a bit inept.