OPIStart To Finish 3in1 Nail Polish Treatment Leaving Long Lasting Shine, Clear Nail Polish Base Coat, Top Coat & Strengthener Treatment With a Vegan Formula, Vitamins A & E for Damaged Nails, 15ml

Fantastic product. It's literally saved my nails and they're a lot stronger. It also protects my nails. I use it as a base and top coat. Using it as a base coat prevents the nails from staining too. Makes nail polish last for days. Highly recommend.

Really love that this is a base and top coat. The brush is a super width and applies really well. Dried really quickly. Quality was perfect and really reasonably priced. Comes off really easily, will definitely buy again.

Good on its own but not great as base/ top coat.

Easy to use, very effective

Fantastic product that has helped me finally grow my nails as it strengthens them

Not as effective as other strengthening varnishes that I’ve used and only lasts a day or two before peeling off, even when used as a base coat.

This is a great 3 in 1 product. It’s an undercoat that even the strongest colours don’t bleed through, then it gives a nice top cost finish and then another one for luck! My colours always grow out rather than either wearing away or chipping. This is the 3rd time I’ve bought his product, and I love it’s versatility.

Not knowing you aren't supposed to peel gel nail polish off, I did. I have never seen my nails look so stripped and dry. I wanted to cover my nails without doing more harm, and saw this. I used it as a base and top coat with regular nail varnish in between. Imagine my surprise when 2 weeks later, I removed it all and my nails look so much better, I almost can't believe it.I would wear this all the time as a base coat now and to generally nourish the nails. One star off because I'm not convinced of its quality as a top coat or a strenghtener. And even as a base coat, it didn't leave an evenness that made it simple to apply the rest. But as nail care and repair, top marks.