Essex uni is a nice little campus uni around a mile from the centre of colchester. Though you don't really need to know this if you're applying as the furthers you'll venture as a first year is the big Tesco's store 10 minutes a way!
The uni is very compact with most of the accommodation less than 2 mintes away from the lecture rooms. Actually finding your way around can be difficult though, as any lectures not in the LTB (lecture theatre building) are in the main block, which is organised into squares. All the bars and shops open onto the squares and are easy to find but many of the smaller rooms are hidden away behind them and it can take a little while to find the right room.
The accommodation is either sociable and scummy (towers) or unsocialble and nice (courts) with the rest falling somewhere inbetween. It's all selfcatered so make sure you can at least heat food up. Also don't buy too much fresh or frozen stuff as there's never enough space in the fridge/freezer.
The people are nice, it's a pretty friendly face and small and compact so you'll often bump into someone you know if you're walking round. On campus facilities are pretty good too - you only need to leave to go to Tescos for food.