Misfire (ignition leads).
Misfire (spark plugs).
Water pump failure.
Tiny spots of rust where there wouldn't be on a Porsche.
Lots of expensive preventative maintenance: new cam chain, new clutch, new brake pads, very regular servicing.
Great car when they're running properly, but prone to usual turbo/performance car problems (misfires, clutch faults etc).
Only 13 dealers in the UK can service them, and 60 quid an hour is the norm. There are a number of parts that can no longer be supplied.
Performance is good as the Lotus Carlton legend dictates, with little turbo lag from the twin turbos. Feels sluggish at lower speeds, but really nails Imprezas etc above 120. A Lotus test driver got 187 from the standard car on a straight road (the 176 figure usually quoted was achieved on a bowl, albeit the large one at Nardo).
Very comfortable, but doesn't do corners all that well. Rolls a lot, but this makes it safer than you may expect in the wet. Think of it as a massively-quick tourer.
Attracts a certain amount of unnecessary attention from Boy Racers (especially Skyline owners for some reason!). The plod tend to follow you, but I haven't been pulled yet.
Oh yes, and the front end is a great big stone chip magnet.