I am an OPI obsessive, and I never really have anything bad to say about their products.
I have this in purple 'Can't let go', and love it. It is so pretty and sparkly and also has a few larger bits of glitter in it. It really does look and feel like sand too! It is easy to apply.
I love it as it is different to any other nail polish i have tried and is very cool :)
I was a little hesitant about trying liquid sand as I thought it could be quite annoying and get caught on things. After I missed a trial offer I was even more tempted to try it as the reviews for it were really good and the effect it gave was amazing. I went ahead and brought the Solitaire shade and it is so pretty. It is not a real white shade, more of a creme and the liquid sand makes it look like there are little pearls on your nails. The feeling is gritty, but it is very minimal that it doesn't get caught on clothes etc. I quite enjoyed the liquid sand nail polish as it was very slow at wearing off my nail due to it's coarse nature and it is easily patched up if it does chip as it blends back in with the original layer.