I've been using BEX for several years now. I would venture the most daunting task is understanding all of its capabilities. We had a lot of misery when we first installed - but that misery was primarily born out of ignorance. We skipped the training - we were all IT professionals you know - and then depended on the backups to save our butts. R-i-g-h-t!
Now we are at the crossroads of needing higher performance. We are considering implementing a disk solution but the debate takes two steps forward....and then a couple of steps back.
Also, the continuing role of tape is another step towards insanity. Some say if you have disk, you only need one copy to tape. Others say regardless of disk, you still should maintain two sets of tapes. And then others suggest thinking twice about the disk in the first place.
Add to it that most IT directors know only one word: cheap The other word they know is: cheap
Chosing hardware is every bit as daunting. The vendor tweaks some benign aspect - and suddenly that tweak is the claim to fame.
I am very interested in improving our performance to meet recovery issues, as well as shrinking the backup window. That said.....I'm all ears!