I paid almost $100 for alterterations on a suit before a business trip. Wore the suit several days during the trip before the alterations started coming loose. One sleeve started splitting at the seam where it was shortened. The lining opened up at the sleeve where it was opened. I had to pay the hotel for an emergency mending.
AAA Alterations also rents suits and tuxs. I suspect their operation is geared more towards temporary alterations and not real tailoring. It's really a shame as the customer service was very friendly. Use at your own risk.