I hesitated a long time before buying this product because it n 'had an evaluation ... I decided telling me that I can always return it if it does not suit me;) here today, gone tried :) it's perfect dry it in 60 seconds I must say that I was afraid to do less because I have a UV lamp and it takes at least 4 minutes for the varnish (permanent) are dry. .. but next time jessayerai 30S ... it's a gain incredible time ... she was a little girl we must first make the 4 fingers then the thumb but the drying time is reduced, n ' is not a problem for otherwise it allows the thumb to dry ... it's not always the case when one makes a hand ... I advise all those who want to save time and avoided the UV more harmful to health TBC effectiveness over time ...;)