This place isn't awesome; but it isn't bad, either.
I've eaten dinner here a couple of times when in Phoenix for work. Both times I've parked myself at the bar, so I can't really speak for the table area. But the circular bar area is comfortable, not too loud, and it's usually easy to find some good conversation (mainly because there are apartments above the restaurant).
I had the filet w/ au gratin potatoes, and was pleased. Add the $3 beer special and you've got a solid meal.
It doesn't seem too pretentious, and the service for me was good (again, since I was at the bar both times, my experience is based on the bartender). There are a lot of varied reviews on Portland's, but in my opinion it's worth a shot if you're nearby and want something comfortable.