Great yarn store to browse and feel yarn. LLoads of roving downstairs and lots of patterns and books available. Very large and overwhelming at first. Make sure you check the hours. I've gone on a Monday or a Sunday (in different seasons) and they've been closed... which sucks when you're coming in from Scarborough just for this store.
But wonderful sales people, and be prepared to walk around in a daze.
Also recomend taking the Queen street trolley across, or take a 20 min stroll from Uni/Osgoode