My experience with DW has been nothing but positive. Each version seems to work better than the last, and version 5 is super fast.
EDIT: If anyone is looking for alternatives to DW, Other World Computing is having a sale on
Drive Genius and
Data Rescue. I'm tempted, but since I have both DW and TechTool Pro (plus a Time Machine backup and two clones), I'm not convinced hat I need either one.
Serge: Welcome to FTM!