They are very easy to apply - just a case of finding the right nail to suit each finger, applying the tab then the nail on top. I had a little difficulty matching the nails up, as the combination of me having very long nail beds, and these nails being short, I ended up having to chop all my nails off so these would fit. My own nails are also quite narrow, so I ended up using a lot of the smaller nails from the pack. The thumb nail (as you'll see from the photo below) wasn't quite right, but it was the best fit from the pack.
They are very sparkly, in a matt kind of without being glossy - I really like the effect they give. Here's another photo from Christmas day where you can see what they look like in a natural situation.
Removing them the next day was really easy - just a case of gently lifting them off - my nails showed no sign of damage.
I would definitely use these again for a night out, I'm just not sure I could cope with them for a long amount of time as I was conscious one was going to pop off!