mum2eim The different accommodation blocks at John's really are different in terms of noise! When DS1 was there a few years ago, Cruddas was party-central till 3 in the morning, whereas The Garth (new block, en suite, pricey) was much, much quieter but some rooms were very warm, as I think they're more aimed at overseas postgrads.
The food is... OK. 'Formals' may well be very formal, but DS never went to one! The rest is sort of school-dinners food (plus sandwiches if you need to eat off site, which is probably the case if she needs to hike to and from the science site).
Some of the beds were an odd size (and made of something very uncompromising) -- I'll ask him if he remembers which halls if you like.