yes we got one (well, we did have one- now we got the next stage as millie's 20lbs now)
thought it was great- much better than fannying around threading all the straps which u have to do without it. it fits really well (ours is a vauxhall astra)
only thing was, we had it in the middle at first, and altho it wasnt a problem when my boyf was driving as he's 6'4" and has the driver seat right back, when I was driving i had the seat forward as im only 5'4", so there was nothing to hold it still and it swung around a bit when i turned corners! but it was fine when we moved it to one side.