MSc Student Accomodation Watch
There's loads of private accommodations in Cardiff so you've got a good choice.
Our new building is right in the city centre, less than 2 minutes from USW Atrium campus and we've got a range of studios and ensuites in shared flats. We've got quite a few Masters students booked in already as well, so PM us if you want more details
I have also seen on my unilife page that there is a marketplace section which has a few messages about accomodation which seem worth looking into.