I haven't had any problems and I've been dipping with them for 3 months now. They're sorta flexible like a real nail but with the dip they're super sturdy. I find that's been best for ensuring the c shape actually molds to my relatively flat nail.

I use this glue but be careful, it really does dry fast. I also thankfully haven't had any issues with this glue drying up in the bottle / making the bottle explode.