In one sense I like because this topcoat can amazingly transform lumpy manicure disasters like streaking or bubbling into an perfectly even smooth surface. Probably because its a thick gel-like formula. But on the other hand it does cause a manicure to become brittle and lift or chip off in very large bits the next day. I like the gorgeously thick brush cause it makes application quick and easy to control but I wouldn't buy this formula again.
I've read many bad reviews about this product, but it really works well for me. I use this and Sally Hansen Insta-Dri, the latter for Konad purposes, and this one for solid colors. It's the brush that smears nail art, not this product, so if you have a clean, natural hair nail polish brush, you can use this to apply over Konad, too.
I don't use this for drying my wet polish, I just apply a coat after my nails are moderately dry, but still dentable. The coat shouldn't be thick, a thin coat normally does the trick. My nails become very shiny and I've never had any chips or tip wear even after three days and an hour of dishwashing. If applied after moderately dry polish, I don't experience shrinkage, and even dollarstore polishes stay for at least 3 days. I haven't tested the product for 10 days as it claims, but all the negative feedback was definitely not in question for me.
I got this in a gift pack. This top coat is so bad that it made me able to peel the whole nail polish coating off in one good piece. Fun, yes. Functional, no.
I got this from a friend who no longer needed it. It applied on very smoothly and was shiny, but I found it did nothing to prolong my manicure. It is not an 'extended wear' top coat as it advertises. It was only around 2 days when my manicure started to peel off in large chunks. Once I was playing around with my nails and the ENTIRE manicure peeled off in one piece lol.
My bottle of this now sits on my shelf unused. I only do French manicures now and even my $2 BYS base coat (very very poor quality) works better than this in prolonging my manicure.
EDIT: I tried to give this another chance, really. It's so expensive in the shops so I figured that it must work, and it was just having a bad day the last time I used it. So I used it on one nail over my Rimmel Posh Trash just to test it out. Nope, it didn't have any effect whatsoever. That nail still chipped within 2 days like all the others. If anything, this *dulled* the manicure (Posh Trash doesn't require a top coat to look good). So this polish is going back to retirement.
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PRICE  | PACKAGING  | REPURCHASE [no]
I much prefer Double Duty over Mega Shine. I didn't really notice that much of a difference in shine level, but my nails chipped much faster using the Mega Shine. Would not repurchase.
More shiny than Sally Hansen's Double Duty. It makes my nail polish look great. If you need a base/top coat, buy the Double Duty one. If you're looking for shine, try out Mega Shine.
I only used this once before I returned it. I expected up to 10 days wear as it says on the package. Instead my polish peeled quicker than it would without a top coat. I notices this polish likes to peel in huge pieces and takes the polish with it. Horrible.
I was really happy with my first use of this product, I thought it went on well enough and it did give great shine and dried fast. So it gets a couple of points for delivering on that end. As far as protecting your manicure or preventing chipping? No go. I didn't find that it protected my nails any better than any other top coat. After giving it another try I found it to be a bit too thick and hard to apply and my nail polish just went gloppy. It states that you can apply to damp or dry nails, but if my nails were damp then it really ruined things. I think it's worth trying, but I won't be buying it again.
This is my standard top coat. It dries quickly and has a great brush.
My major complaint is that it doesn't protect manis ALL that well. I've definitely had manis chip on me w/in the first couple days.
This product is great. Works just as well or better than more expensive brands.