Not a problem at all, it was something that I was concerned about but there is nothing on the car that you cannot get to as it only really blocks the passenger and driver floor pans. They come with Rubber blocks which support the car and give access anyway and if you really needed to you could boost up the blocks with sturdy chunks of wood. I have completely stripped and rebuilt my car bare shell and not had any worries.

You will be amazed how much you use it I think. Friends also pop round to swap wheels etc. I have had a 4x4 Merc people carrier up on mine which was close to the safe working limit, it was huge.