I was going to refrain from commenting because it's hard to know when one's experience is unique or common, but having read the comments here now, I'll offer my .02. First of all, I couldn't agree more that Chris is an exceptional Alfa mechanic and true Alfista, and that alone is a good reason to take your Alfa to Roger's, assuming you know exactly what you want done and are very clear about it, get your estimate in writing, etc.
HOWEVER, I've had primarily bad experiences dealing with Roger, and would agree 100% with an earlier comment that he doesn't much want to deal with pre-70's Alfas, or maybe just Alfas in general, as his shop usually seems to have nothing but Volvos and BMWs in it. One example: I brought my old '69 Berlina in to have the master cylinder inspected -- basically to verify my suspicion that it was shot and if so, replace it. I explained everything on the phone, ie that the original dual master had been replaced with a single (a common 'fix' for when the unobtainium '69 dual masters go south), all the symptoms, etc. To get the car there I used up one AAA tow. After a day and two phone calls repeating all the same information, I then got a call from Roger to let me know he didn't want to deal with this problem because my brakes had been "heavily modified".
So I had to spend another AAA tow to get the car home, and to add insult to injury Roger charged me an hour's labor to bleed the brakes, in spite of all the information I'd given him that pointed very clearly at a crapped out master and nothing else. Once I got the car home, I got a new master from IAP and installed it myself, and had no brake problems after that.
I won't take a car to Roger's ever again, in spite of the convenience (I live and work in Oakland), and in spite of the fact that Chris is such a good mechanic. It's really too bad, because there are a lot of people willing to spend money on good service for their Alfas, and we don't have many options here in Oakland.