I've been using NSI balance gels for ages. The clear gels and the french overlay are great, but the colours leave a lot to be desired.
Firstly, they are buff off rather than soak off which I have found is really time consuming. Also, I had a problem with some of the colours cracking, I rang NSI who told me that they have changed how they make the colours and that the new coloured gels need 3 coats to stop them cracking. It hasn't worked and my clients who have colours always end up with chips or cracks, but my clear and french overlay clients always come back with perfect nails.
Coincidentally, I have been looking at the IBD soak off gels. I use Nailtiques in my salon which is supplied by Grafton, who also supply IBD. My rep gave me a sample kit of the soak off gel and I love it. I think it is in the same league as bio sculpture.
HTH's
Natalie
xxx