If you guys want advice on car alarms, go onto
www.talkaudio.co.uk/vbb. The people to talk to on there regarding Alarms are Nige, VD (also known as Van Dave), Jexdirectedtech (Jim: the ex main person of Directed Audio, who own Clifford...), and the Troublestarter (someone who installs them for a living and has a good reputation).
As you will see on some posters on TA, and many others out there, people say my alarm goes bleep on an off, so it must be fine. When you consider out of an old car I took a top end CAT 1 Alarm out of it (a Clifford 650) in 30 minutes, you do wonder how some people get certificates. I hate to say it, but most DIYers out there could probably install a car better if they had a spare week (I mean to be well concealed and working well). A good pro will take around 2 days.