I am a massive nail polish fan and have a huge collection of OPI. Every time I paint my nails (which is very often!) I use a base and top coat to prolong my polish and protect it from chips and nicks.
The OPI Top Coat was a bit of a disappointment and it is not a product that I would be keen to use again. I have purchased this product several times and each time I have used it, the first few uses are great - the polish goes on smoothly, leaves a nice shiny top coat and makes my polish last for several days. However once the bottle has been opened and used a few times, I have found that the product hardens in the bottle, becomes thick and gluggy and leaves a sticky, gloopy coat on the nail. It is hard to spread and ends up taking ages to dry because the layer is so thick. I thought the first time that I may have had a defective bottle, or perhaps it became too oxidised. But after trying this product another 2 or 3 times, and each time this happening, I have concluded that it just simply does not last the distance, and for $22.99 I would expect a lot more!!
I have since tried other top coats from different brands and have not had the same issue. My recommendation is purchase OPI polishes but stay clear of the OPI Top Coat!
After trying quite a few cheaper bRands of top coats, I finally caved and bought the OPI top coat and haven't looked back! This is a great top coat to use to make your nail polish last. This is well worth the money in my opinion.
Tips: Make sure your nail colour is very dry before applying the top coat. I apply two layers of top coat just for extra protection, but one layer works fine for me too.