I just did the opposite - purchased my first ipad (arrived yesterday) after having had several android tablets - Nook, Kindle and Samsung.
My Samsung is about 4 years old and the battery is shot - but I read the reviews before I bought it and they said some had battery issues. The kindle is even older. I still have a Samsung track phone (android) and a windows desktop.
I did seriously consider the Samsung Galaxy S3 which was $130 off at Costco but the negative reviews mentioned that the entire tablet is glass and a bit more fragile.
Probably Christmas weekend will be spent transfering my files from Samsung to the ipad.
Good luck with whatever you choose.