Turbo timer

Has anyone here installed a turbo timer on a 2003 GTI? Im gonna buy one soon but not sure what kind to get. I want one that will fit in the lil clusters near the defroster buttons. Ive heard of people having problems with the windows and shit after install.
is a Turbo timer really worth having? Sure i could sit in my car and let it idle for a few min after i go for a drive somewhere but i really dont want to. LOL

any help would be appreciated

Hey there,
I installed HKS TTimer into my 2000 GTI and it works nicely. I tear down my car every day with 14.5psi on stock and never had any problems with turbo what so ever. I highly recomend it....works wonders..

http://www.hksusa.com/products/?id=845

Hope that helps