i had the worst experience with them, they were charging me 100 quid extra than a local place but i went with them as i needed it done quick and the local place was 2 week wait, ne way got them to come out, and the person that comes out is not a gap person, they get some random company to go and install it for them, the bloke that installed it moved my coolant bottle so he could mount the siren, all the coolant ran out i didnt know and i drove the car, but noticed the temp before i got to far.
Then when they put all the trim back in the car, it all rattled like hell. I have caleld gap many times and i have had no luck they wont do anything about it, when i bought it i was told i would get a free cliffnet wizard and a pager system which i never got, gap have hung up on me when i have called them and they are just the worst people for after sales service, and if u want to keep up the offer they have of if your car is stolen that they will refund u etc, u have to have a service each year which costs 150-200 depending if they have to fix ne thing or not but base price is 150.
They gave the worst service i ever had, dont bother with them, find a mobile alarm installer, some companies will come to your place of work to install it, and some will come out on sundays.
go with gap if u want but i would never use them again or even recomend them, they sent me a letter the other day saying for a special LOW LOW price for certain customers only they would fit remote start to my consept 300, the price was 150 quid! when u can buy the unit for like 80 quid and i got a m8 that will fit it for a few pints.
complete rip off, worst money i ever spent.