I use a car over there because I have so much running around to do - I want to watch the races, but I have to visit all my friends etc (I grew up there so I have a lot to visit).

If I was just going as a tourist I would go on foot over the car - the transport is excellent, and even walking beats being on the roads sometimes when its all a bit crazy and congested. I did the MGP on bicycle one year, all I remember is feeling extremely relaxed afterwards - don't think I went any further than Port Soderick to Onchan