I got the Gel one about a year ago now, before I did any research (silly me!) and it didnt work for me at all, I didnt complete it and since finding this site have been saving up for CND training. Like someone said above, you do need alot of motivation to do it, and for me, without anyone there telling me what I was doing well/awful, or showing me in person, I just really couldnt get into it! However Im sure lots of people have had success with it! Thats my opinion though : ) xx