LOVE THESE!
I use the Kiss instant glue instead of the glue provided and make sure to keep my nails/hands out of water for a few hours.  I often put them on at night right before falling asleep...they stay put for at least two weeks.  They do weaken your nail a bit but will not do a ton of damage so long as you remove them properly.  I do find that the using the sticky tabs instead of the nail glue causes more damage to your nail..so I stay away from the tabs.
Rating: 5 stars