i gave birth at UCL summer 06.
the antenatal care was not great, presumably, to total oversubscription. simple midwife checkups took half a day because of all the waiting. i never saw the same mw twice, etc...tbh this didn't really bother me much bc i figured if there were any problems i'd have been dealt with.
ultrasound peeps were very good and considerably less waiting time
labour/birth - mixed view on this. i was unable to get an epidural b/c the anathesitist [sp!] was busy. i also made the stupid mistake of going into labour during a shift change [8pm] which was a real nightmare. i also had a pretty crap mw, but after dh complained we got a new one who was good and helped me move swiftly along.
post natal care - bad. due to a pethidine injection i was given late in labour my ds couldn't nurse properly although he did appear to latch on. we went home for 3 days, were inspected by 2 mw and 2 doctors who missed this rather huge issue. having then realised the total cock-up after we brought ds into hosptial they readmitted us both with the heaviest hand possible and forced me into a 'breastfeed at all costs bootcamp' and my poor son into neonatal ward, when i now know he just needed a few good feeds. worst week of my life.
having said all of that i am still not sure UCL is any different from any other hospital. after hearing varied responses from many friends, i think nhs maternity care is unpredictable. i think you just need to have a very clued up birthing partner who will advocate on your behalf and reasonable expectations for the birth itself. the nhs does know how to deliver babies, it's just they seems to make a bit of a mess of all the parts surrounding that event.
sorry this is a bit rambling...
also, for a more objective view look here: www.birthchoiceuk.com/