Nice units, but overpriced and lousy support. I've owned 3 of them. One of my early Drobos, they refused to help me when the unit was going bad and I had to try to get everything off because they wanted hundreds more for support. Really? I already paid 3 times or more the cost of a standard RAID and without a performance benefit. I hate that they try to nail you with even more fees for "support".
I had a friend whose Drobo literally melted down, trying to take the drives with it because the fan stopped functioning. (He had been doing an unattended backup or something to his Drobo which contained his entire image library and LR catalogs). He spent months trying to recover his images (luckily, he had a VERY techie friend who does that stuff), and after 6 months, recovered 95% of everything lost. It was made harder and more gruesome because of the non-standard RAID in the Drobo. The friend said that, had it been a standard RAID (of any flavor), he could have recovered the same files in a month. That scared me. So, my latest Drobo sits in it's box, unused.