Not on a Rezound (am on a HTC DHD) but I thought I should mention this here, since this is the top Google Search on Titanium Backup versus My Backup Pro. Initially, I preferred MBP more. It has a cleaner user interface, and it displays files names better. The ability to display long file names is great when going through system apps. What it lacks is a good filtering system (example: display all frozen apps).
There is one deal breaker though with MBP. The backup part of the app works well. When I get to the Toolbox part, doing things there cause instability to my phone, causing it to lag and Sense to reboot/reload. Reboot, or worse a battery pull, of the entire phone sometimes seems necessary to remove the lag. Maybe to heavy on the RAM?
Only gave a quick look at TB. Will give it a longer look.