Car ramps, good or bad idea, any opinions

Hello, I know that this discussion is about ramps however, I thought it might be an opportunity to ask if anyone has bought and/or has used one of the many car lifts that are available for domestic use. The picture I have pasted below is the Sealey portable pivot car lift with a lift capacity of 1500 Kg. I am thinking about getting as I have very limited space. It would be good to get some feed back on this. Thanks.