No, I hated it, when I worked for VW and would turn it off on my company cars, I would be driving along with the tunes blasting then pull up at some lights and it would go all quiet!
I found one on ebay, the stereo shops want about £15, only need to change it because i've put a stubby little aerial on and my receptions gone. If it works i will let you know.
http://shop.ebay.co.uk/items/_W0QQ_nkwZvagQ20aerialQ20boosterQQ_armrsZ1QQ_fromZQQ_mdoZ
Did this make a difference? I've got a stubby aerial I want to fit but will definitely need a booster.
I have a C2 aerial with an aerial booster and I can very rarely pick up anything. It does depend on where you live though...I live in the countryside in Devon, but even in Exeter city centre I can't get much.