Good, fast duplicate file finder/cleaner?

[JeffL]

I need a duplicate file finder that is fast and lets me easily decide what to delete (for my notebook HD.) I did a search and found enough that I would prefer at least a little guidance from anyone who has used these in terms of which they like (and dislike.)

Thanks.

[Freezer-TPF-]

I've used DoubleKiller in the past and it was fine.

[unbongwah]

I use Clone Spy (www.clonespy.com); hasn't failed me yet, though I don't use it often or do anything fancy with it.

[Midnight Son]

Doublekiller. Have used it for years to delete, uh, duplicate jpgs. ;)

[jpinard]

OH awesome. I need to do some housecleaning too. I'm a backupaholic.