I have mixed feeling about this….
PROs
-Does what it says, strengthens nails after several days/weeks of using
-Used as a base and top coat it makes your manicure last (if let dried properly)
-Leaves a shiny (not glossy) finish

CONs
-Takes LONG to dry
-Used as a base makes some polishes streak on first application
-If used on top of nail art it streaks it REALLY BAD. (I only use on top of solid color)

I do and will repurchase this product because it is good, but unfortunately I have to be careful on how and when I use it.

I have dry, peeling fingernails and toenails. My doctor recommended I get a nail strengthening treatment. She actually recommended Nailtiques, but I couldn't find it and was impatient, so I purchased this instead. It might work fine as a basecoat, but when used along it makes nails look yellow (yuck). I do not plan on purchasing again.

Pros
- strengthen nails (prevents peeling)
- dries quickly
- prevents staining from dark polish when used as a basecoat

Cons
- gives nails a yellow cast, especially with multiple coats
- when removed, nails appear dry underneath

It's the best! Won't use anything but. It is my base and top coat, and helps my nails get stronger. I just had gel nails taken off and this stuff is honestly like nail rehab. Works perfectly.

Well, a few months ago, some of my nails started to flake very badly and I read the reviews and settled on this to try (several people recommended the original over the flaky nail version) so I shelled out almost £20 on a bottle with high hopes. Well it looks very nice as a clear nail varnish BUT after following the instructions to the letter for probably about 3 months, my nails were in a worse state than when I started - the peeling bits peeled larger a area off as the varnish held the top layer together (if you see what I mean) and my nails went quite yellow and unattractive. Back to better nutrition and lots of almond oil rubbed into my nails and cuticles for me. Waste of £20 IMHO.

Takes a LONG time to dry, compared to other basecoats (even sticky ones) and especially compared to Nailtek's Intensive and Foundation basecoats and treatments. Polishes that work fine with other base coats drag and streak with this as a base coat - opaque good formula cremes!

The nail on a couple of fingers also peeled in multiple places after using this for a few days - previously used Nailtek and Bonder, or alternated them. Could be random, or not - I will continue to use this for a while, but would not repurchase.

I love love love this product! I got it for dirt cheap at a sale at my local salon but would definitely pay the full 20$ for it. I use nail polish and nail polish remover every week and my nails peels and are super flimsy. When I started using this product I noticed a huge difference! I don't notice yellowing on my nails, it encourages them to grow and makes them so much stronger. I love the brush size and it drys super fast. I also find that for me it works as a bonder as well. I am for sure buying this again and have told all my friends about it.

Have used Nail Envy on and off and its the only thing that allows my paper thin nails to grow past the end of my finger, I tend to build up layers and then sandwich a colour between them, as my nail are unusually thin so this would not be necessary for all, I like that you can apply over colour and still get the strengthening, I tend to buy when on offer in duos from QVC though you can get cheapies from ebay if you watch carefully. I have tried the Matt version and particularly like that plus it seems to provide more adherence for a colour so an excellent base coat, without this I cannot grow my nails so I am rating it highly.

this is the best nail conditioner in the world. I love the wide brush, too.

WOW!!! This product really works! I purchased original nail envy 2 weeks ago for about $18 & cant believe the results! I had very weak brittle thin nails & now they are healthy & growing rapidly! I would absolutely buy this product again! continued >>

I bought this product quite a while ago and I'm almost through 3/4 the bottle.

Pros:
I absolutely love this product. It keeps my nails very strong and I notice that my nails grow really fast since I've been using it.

Cons:
My nails turn yellow after removing the polish.
It's incredibly difficult to get anymore product out of the bottle even though I see a huge amount pooled at the bottom of the bottle.
The product is around $17-$18 in the US and I find that a bit pricey for a product, even if I love it.