When I had a DroboShare it would drop connections under moderately heavy loads (like a sustained multi-gigabyte transfer as I tried to fill it initially, or a few simultaneous transfers). If you are going to be more than a light NAS user, I’d look at another solution like a small PC (Dell Zino HD or Mac Mini) to share the Drobo, that is what a lot of users here seem to do, myself included.
DroboShare obviously works for some people, but the majority here seem to have issues. This is typical for this type of forum though, most people don’t come to them unless they have a problem. I started coming here because of the DroboShare issues I was having but stuck around.