Its My local shopping centre and my business is based there. The Grafton is an older style shopping centre slightly detached from the main centre but none the less quite busy. We always tend to go to the Grand Arcade and city centre and not to the Grafton.
Main stores according to my wife and daughter are early learning, debenhams, next and primark. There's also a big vue cinema which is a pretty big draw.
Cambridge as a city is very un car friendly so people tend to walk a lot when in town which is the saving grace for the Grafton, it's about five minutes walk from the city centre. It also has its own car park and as car parking is so limited the car park will always be rammed on busy shopping days but I can't vouch for how many people park there and then shop at the Grafton.
I hope this is useful but as I'm not really interested in shopping at all I'm probably not best place to advise you!