The medicine course is constantly changing from year to year ever since the new intergrated course was introduced. For my year the course was a bit unorganized but i think that for all the new med students joining it is now more structured. The work is not really difficult to understand. it's just a matter of learning a rather large quantity and trying not to cram all revision in the few weeks leading up to the exams.
The med school itself is very separated from the rest of imperial- it has it's own student union, sport clubs, bars scattered around different hospitals etc. therefore, the medics tend to stick to themselves, and you get yourusual cliques within the year (eg rugby boys, rowers, overseas students...). Whereever you go there are bound to be medics around as the year is so large. The ratio of girls:boys is about 60:40 so this is where all the rest of imperial get the better looking girls from! The ICSM union organizes events throughout the year, not only the friday night bops, but fresher's week (helluva lot better than ic's) and our renowned RAG week and lots more.
All freshers get accomodation in the first year unlike other london unis. My halls in the first year had just been refurbished a few years back so was relatively clean and modern inside. The hall organized load of activities to do throughout the year such as going to the theatre, eurodisney, alton towers, casino nights... and the hall subsidises the cost so it was easy to have fun without spending a bomb. There are lots of places to go out, whether it's to the local pub (pricey), cinema (getting cheaper), po na na's in hammersmith (full of roehampton uni ladies also), union (no one goes there except for saddo engineers), reynold's bar (charing cross site and very cheap) or into london for night out whether cheap or expensive. There are lots of places to go shoppping too; king's road, kensington high street, knightsbridge within walking distance or just get the bus/train into central london to the usual hotspots...
So I would definitely recommend coming to Imperial. I don't regret choosing this uni- I have loads of fantastic friends, love my course and am having a brilliant time here.