No reason at all to avoid it like a plague. If you did a little research before you bought a Drobo(as I did), there will be no surprises. I've never had any issues (since 08) with Drobo enclosures or there more than helpful customer service.
In fact most of the problems with Drobo are user error. I've talked and read post where the user got tired of waiting for the Drobo to rebuild the array, and turned it off, as to start over. I've never done anything so stupid. When losing a drive on a Drobo, I replace it and forget it. The Drobo will do it's work in the background, as long as someone does not turn it off.