I've tried Sally Hansen's Insta-Dri before and didn't care for it but since Mr. W.'s little 3 year old neice is able to use it to paint her little fingers, I figured, so can I!
For just one coat, the color turned out to be bold and smooth. However, I didn't like how you can only do one stroke otherwise it will take forever to dry.
This definitely is a time saver-- took me litereally less than 10 minutes to paint and dry my nails! Only down side is that you must get it right at first stroke. For me, I had a hard time making sure I paint the corners in just one stroke.
Also, it chips really quickly, so don't expect it to last the whole week! I'll definitely use it again when I'm in a rush but if not, then I'll probably be back to my OPI and Essie stash instead!