We had a sink problem and wanted it fixed fast. We called roto-rooter and they said they would have a technician at the house within the hour (on a sunday no less!). I was very suprised because I envisioned having to wait forever to book an appointment. The technician arrived in about half an hour, identified the problem right away and took care of it. All in all the problem was solved in about 1.5 hours. The price was a little steep but to me it was worth it for the convenience of having the problem solved quickly.
Pros: super fast, efficient
Cons: a little pricey
more