I'm not super experienced with eyebrow products and just started using them regularly this year. I have used Anastasia clear brow gel, Shu Uemera Hard Formula pencil in Seal Brown, and NYX Brow Mascara in Brunette. I've also used Maybelline Great Lash in clear (wouldn't recommend this one for brows). My hair is dyed light ash blonde, and my natural hair color (and eyebrow color) is light brown, maybe around a 6.
NYX Brow Mascara is the product I've tried that probably does the best job on its own. The other ones I've used have to be paired to really get the look I want. For the record, I've never been a fan of that hyper stylized, defined, Kardashian style arched brow. I'm going more for the bushy, slightly unkempt, 80s Brooke Shields vibe. If you're going for the same eyebrow look, this product is a good one to reach for.
Brunette is a good dark/medium brown ashy shade. I was worried it would be too dark because of the name (I'm not a brunette) but I went by the color swatches, and it ended up being a great match.
This one does a great job of plumping up my eyebrows and making them look fuller on its own, without the help of a pencil. It looks very natural. It also has moderate hold and is pretty good at keeping the shape I want (brushed up), but usually by mid-day they've fallen a bit. Anastasia brow gel in clear is quite amazing for hold, so sometimes if I'm feeling extra I'll follow the NYX mascara with the Anastasia to really keep the shape I want all day.
Biggest con, which is to be expected with any mascara, is that it can be a little clumpy. However with practice using it, it's really not that bad. I have to be especially careful in sparser areas like towards the outer brow, because when there's less hair for the product to cling to, I can wind up with little dots or tiny streaks of product that need to be taken care of. I don't have to be careful in the thicker inner brow, but on the outer brow I just need to be extra slow and use a very light hand. I would definitely recommend a clean spoolie to brush and even out the product after you've applied it.
Also I've had the best results by applying the mascara in the direction my eyebrows naturally grow, then using a clean eyebrow brush/spoolie to go in and brush the eyebrows in the way I want them to go. If I try to shape the direction of the hairs with the mascara brush, it's more prone to clumps.
Anyways at the end of the day, I'm very happy with this product and likely will repurchase. It works really well, especially for the price. What would make it a perfect 5/5 product is better hold.