They carried out a basic service on my IS250 which was absolutely fine. The ISF, carried out a pre warranty inspection and MOT following purchase. On the MOT they missed the two front tyres which were MOT fails which resulting me losing faith in them. Asked them to look into the lack of Bass to the Mark Levison and they didn't recognise there was a fault, after me insisting, they identified that the sub woofer was faulty. Apart from the missed worn tyres they've been Ok, very average. They service on site which I prefer to Twickenham. They didn't offer a very good deal on the 2 year fixed service plan. Next service I might go back to them for convenience or try Guildford or Milton Keynes.