Failure is inevitable and it is only a matter of time until it happens. You're going to be finding the same issues with any other nas/raid solution and with the drives you use in them. Maybe drobo is more likely to fail than the others or something by unfortunate design (and with droboshare, I could believe the fs corruption), but they all have the potential to fail in some way. (You're also talking to someone that's had more SSDs than hard drives die on her in the past six months...)

When I was shopping around for drobo alternatives (back when I couldn't stomach the price just yet to buy one and I was getting a bit sick of my hacked-together raid in one of my computers), product reviews and blog entries read exactly like what I see here with the drobo being hit or miss. There were people that were all "DO NOT BUY!!" because they lost all their data next to the people just gushing over how much they liked theirs cause it was working like a charm. This is a tough market, because people don't want to lose their data, and when (not if...) they do they get quite pissed.

It's really up to you to determine your needs and to find a device or twenty that meets them. I rather like the drobo because it's zero maintenance. I don't trust my data to it, I only trust it to keep working when a drive has failed. But that's about all I can expect from any such device. The whole market is pretty much hit or miss for people - it's a hit until it misses, then all you can think about is how it missed.