I used to work at horizon audio/motorsports in canton, OH.
THe one that we sold was as follows:
R/S Unit was like 260 some dollars
"U" bypass module was an addt'l 50 dollars (uses kay under dash)
In order to get you car started in the morning you had to:
put the car in neutral
pull ebrake
turn key (the engine still runs)
get out and close door
lock/kill engine/arm
-- if at any time you get in you car for anything, you have to do that complete process all over again or it won't start in the morning.
IMO, that's a lot of work just to be able to push a button to get your car started in the morning; but on the other hand, it might be worth in in the extreme northern states and canada...