Unfortunately, all I have is n=1 anecdotes. As I'm fond of saying, we have no newspapers here, so it's hard to get data!
But I liked the state-mandated individual plan enough that I've told our CFO we'd be better served by having no health coverage. With only 10 employees, we don't qualify for anything but a low-tier HMO, and apparently risk pooling (i.e. business-association group plans) is no longer allowed in MA.
I think the individual plans might be a worse deal for families, though, which is of course a big consideration - I have no dependents.