I stayed with Unite in Aberdeen last year, at Hillhead Halls and hugely regret doing so! £120 a week is a lot of money for the scant quality of service you actually get and is not worth the way you are treated by Unite.
There were never any Unite staff in the office if you had any problems or queries. On a couple of occasions, when the fire alarm went off in the early hours of the morning (which, in the Unite buildings, happened very often) us groggy students, in the cold and in our pyjamas, were shouted at by a severe-looking woman in a police-esque security uniform (Who we later nicknamed 'Supercop' - she was obviously unhappy with her security woman status). On another occasion, after some students placed wine bottles up and along the stairs, Unite pushed a letter through the door of every flat in the block informing us that, for cleaning up the bottles, they were going to charge us £200 per flat. In a block of 8 flats, this would have made Unite £1600 for cleaning up 30 bottles!
The charges they place upon you at the end of the year are excessive and disproportionate. If you stay with Unite there is no way you will get your security deposit back. Some friends of mine were charged over £600 each at the end of the year!
Damage to your key card, which will happen within the first 6 months as they are not that durable, will result in a £20 charge for its replacement. I myself was charged £10 simply because they claimed there was "1x Black Bag" left in my room. When I asked about it they couldn't seem to give me any more specific information, they couldn't tell me what was in the bag or what sort of bag it was. They also charged me £12 for a paper mattress cover, which was never under any circumstances going to last a full year. I thought this was a free item when I arrived, it was only when I saw the breakdown of my charges at the end of the year that I realised I'd been charged for it - word of advice, leave the thing in the packet in a drawer, don't use it unless you're willing to pay £12 for it!
I was also charged £100 for a mattress. Unite had decided that the mattress I had had to use that year, complete with broken springs and cigarette burns, was fine for me to use but now it was in a 'condition unsuitable' for the next tenant.
In short, it would be better value for money just to rent accommodation from a private landlord. You can avoid the hassle, harassment and penalty charges that Unite continue to deal out to growing numbers of students each year.