I had a Dell DJ and it eventually crapped out on me. It would always get hung up and freeze and eventually just stopped working all together. I don't think this was an isolated case because I know a few other people who have had the same issue.
I may be wrong but I don't think Dell even offers support on the old DJs anymore.
I liked the Dell because it was a little bigger and I felt that it could take a little more of a beating (I used it to work out mostly) but I guess that isn't the case. I need to get something else in the near future.