I have 4 Devon Rexes and they're lovely. They're very active, playful, talkative and social. They wanna be wherever you are!
When it comes to "patchy fur"... well, what it comes down to are blood lines. In Sweden we generally have very, very nice coats. Very few patchy Devon Rexes are seen here.
All my females are fully coated and the kittens I've raised have all developed full coats.
Here's my oldest Devon Rex, Geisha (definatelly no naked patches on her):
Here's the younger one, Pijor (still a lot of fur, however not very wavy):
Here's the youngest girl (the first female born in my cattery), Zombie:
The youngest one in my cattery is a stud I bought a year ago, he doesn't have as much fur as the girls I have, but still fully coated. Meet Dobby:
As long as you choose a kitten from well coated blood lines chances are very good you'll get a fully coated Devon Rex. I've seen many American Devon Rexes with wonderful fur so it's not only here in Sweden we have nice coats on Devons.