My shower faucet was broken and would not shut off. I called Mr. Rooter and they were able to send a technician who arrived within an hour. The technician, Brian MacDonald, was very friendly and explained the repair thoroughly before starting any work. A diagnostics (without repair) would've been $117 and to repair $345 before tax.
The problem seemed to be a faulty cartridge and the previous technician that installed it did not lube it properly. It's a brand new building and a Moen lever, so should not have broken so easily. Knowing this, Brian even indicated the situation in the invoice so it would be easy for me to claim warranty in the future.
Although the fix was very pricey in my opinion, Mr. Rooter provided very professional work, came to my home very quickly and the repair also includes warranty.