Update: the faucet wasn't attached properly; am making call today for this to be fixed.
Daniel came over shortly after the expected timeframe (I called at 8am, was told to expect service within the hour, and he arrived ~ 9:20). He promptly diagnosed the issue, referred one sticking point to his supervisor (whether or not to turn hot water off to the building, briefly), shopped for parts, fixed the valve and faucet all under 2 hours.
The website offers a $22 off coupon which helped alleviate some expense.
Service was prompt, clean, professional, and courteous. Estimate provide prior to commencement. Labour has warranty guaranteed for 6 months.
Yes, I would use them again/recommend them to others who want to pay for worry-free service and get the job done quickly.