Next Day Install on my own GPS and XM. Nice Salesman and Installers..
I took my gps/XM unit here after being told by Audio Creations an install couldn't be done without at least $1000 of custom work. Tweeter did the whole install exactly how I wanted it for $180 on the next day. I talked to the installer and he did the job just like I requested.
He forgot to plug the rear defrost button back in. I took the my car back in the next weekend and they did this for me in a couple of minutes. No problems and highly recommended. Just make sure you call or make an appointment before the day you want them to install.