I've only been to the Oxford one a few times to get a few things (not a full shopping) and it didn't bother me.

I go to the Leominster one at the mall and it's nuts always. I try to go around 6:45am to get in and get out. That's the only time it's not busy.

I recently went to the one in Littleton and the store layout is the reverse from what I am used to and it was so unbelievably terrible.