I had tint done here a last year and just got an alarm installed today. The alarm is a Viper 791, battery backup, 4 sirens, 1 battery backup siren, and 2 piezzos.
This place is THE BOMB. I wasn't expecting them to be done so quickly either. Took about 4-5 hours tops and let me tell you, it was quality work.
The brain was hidden very nicely, no wires showing or anything. Let's just say it's in a very unaccessible place. Even if you knew where the brain was, you would not be able to get to it very easily. 4 sirens under the hood, 2 piezzos under dash, 1 siren in trunk. Everything was mounted great and hard to find.
I paid $270 for the install which seems high, but the bare alarm/remote start/keyless costs ~$150. I paid a little extra since I had extra goodies and it was well worth it!