I'm currently using and enjoying Shellac. It is less thick than other gels, and feels just like normal nail varnish. It comes off with some acetone nail varnish removers - you do still need to do the wrap in foil mallarkey.
Normally if I get a standard manicure, it lasts me a couple of days when done professionally. I'm getting 3 weeks out of Shellac, even doing the washing up without gloves. For the first time ever, I am really able to get some length on my nails - not masses, as my nails are a nightmare - they bend, they break, they flake. I dare say I will need to take a break from it at some point, to let my nails breathe, but for summer, I'm loving it!