These nails are BEAUTIFUL and fit my L sized fingernails well. As a first-time nail user I found these very easy to put on and relatively easy to take off. I used the stickers that came with the nails, and they were more than enough for me. I wore them for about 9 hours and then took them off before bed, but they were showing no sign of budging without soaking them for ages in warm water so I think they would've stayed on for at least another day or so if I'd wanted them to. Very happy with them!
Note the nails themselves are a bit smaller than your actual measured nail bed, so when choosing your size I'd recommend choosing higher rather than lower. I was measuring up as between an M and L, but went with L and that was definitely the right choice.