I've never tried them myself; but a reg playing partner of mine has previously and he doens't go back there anymore.
If you only play uptown, I'd probably suggest getting it done at the club you play at. I know everyday badminton has stringing service as does Lee's. KC gets theirs done at max sports I think. Or you can go to Koyo (the guy from Yo's); if you're hwy 7 & north; Lee's or Koyo is probably your best bet.
Koyo does do same day (sometimes same hour) stringing if you want. He's operating out of his house at the moment near McCowan and Hwy 7. I'm located downtown but I make the trip up to him once every couple of months and give me a bunch of rackets to string. It's completely worth the trip.