I think they're great -- I have 5 with a 6th incoming eventually, depending on what is going on with World (the Axe Palace run). They're solid, and I actually like the HFS/Vintage pickup combination better in the 7 than in the equivalent 6, and I think they're the best choice for a starter 7 string. They're also a strong, predictable foundation if you want try pickup swapping. My only complaint is that I've recently discovered maple necks, and that's not how they come, but I'll be getting a PS of my own eventually, to fix that.
I definitely like them more than my I...s. If you can find a pickup combination you like, the Sch....s are pretty darn good combination, but they're a bit more expensive (new vs. new). I do like my C...s, not going to complain about that -- I have a couple DC727s, but I still find myself playing my PRSses more frequently. But the C...s are also significantly more expensive (new vs. new or used vs. used). I don't think any of the other comparably priced 7s are even close, quality wise.
I'd still like to see a core PRS seven stringer. Or at least a limited run, like the Holcomb. I'd be all over that like...like...like cat fur in a cat-owner's apartment. Okay, that doesn't sound very appealing, but I'd be all over that, that's my point.