We've got one, had it just over 2 years and I've just put it back into pram mode ready for baby number 2 (who is due tomorrow!). I really like it and haven't had any probs with it, but it was too heavy for me to lift in and out of the car while I'm pregnant.
All the accessories are really good quality and have all been well used....it's a shame it's all got to be hand washed. I didn't bother with the car seat so I can't comment on that (we went for a cheaper, lighter weight one).
There are loads of reviews on the mothercare website, some good, some bad, but it depends what your need are - do you travel mostly by car or use public transport? If car then as long as it fits easily into your car it'll be fine (it didn't fit into a Ford Ka....but then I don't suppose many prams would!) but if you use the bus a lot, it is quite heavy and you need two hands free to fold it up, not easy whilst holding a baby.
Good luck choosing!