Got it yesterday and built it last night.

It works great, FM reception is definitely equal or better than the head unit I was using before. AM still seems a bit shaky, but Steelers season hasn't started yet so I can't really be bothered too much.

One thing I had was that my power antenna (stock Scooby Impreza '95) had the annoying tendency to stay up even when playing mp3's and TA was disabled. So I scoured the FAQ and found the '1K resistor fix' for the regular tuners, I guessed PCA's tuner was possibly suffering from the same problem.

Got a 1K,1/4W resistor this morning and soldered it across the power antenna and ground wires. Works like a charm, I couldn't be happier right now.