i have been wearing false nails since xmas. I get mine from www.byvixi.com who actually do next-day delivery if ordered before 3 pm. And they do arrive the next day.
I have quite large hands and i have found the large coffin nails work well for my finger shape. There are 10 sizes, 50 of each although i only actually use 4 of them.
I use glue from savers and have had a set on for a month before with no real issues.
I now change my nails weekly, as i like to change the color and have started using foils to add extra personality to them.
I tend to trim and shape the nails, then apply 2 coats of color before adding the foild details. then 2 coats of topcoat.
All this can be done before applying the nails using little stands I found on eBay.