I just got mine last night. It was too late to do a permanent install, but I plugged everything in and set the antenna on the dash board. Even on the dash, I had no trouble getting reception on my 80 mile commute to work this morning. (Except for when I took a corner too fast and the antenna slid off the dash. :b ) My only issue is with static. Every frequency available on the JVC fm modulator is occupied by some sort of station interference. A quick search on the sirius backstage forums turned up this:
SATSWB
It basically switches off your antenna when you have the sirius receiver powered up. Supposedly eliminates any static issues. I wish I had a head unit that I could just hard-wire into, but this is a good enough solution until I can afford a satellite-ready HU. I'm going to drop by Circuit City this afternoon to see if they have any in stock.
Even with the static I had to wonder this morning: How in the hell did I ever live without satellite radio??
As Mike said above, thanks for the heads-up on the deal, Michael!