I found Rooter Way here on Homestars - called him because he had good reviews and was local - Dan answered the phone himself and I described situation - he said he would come between an hour and hour and a half and he arrived at about the hour.
He immediately pinpointed the problem and brought in a large drain snake (we had already tried 3 snakes ourselves to know avail but his was a larger unit.) Some of our problem was leftover from a previous repair several years ago.
Dan worked hard on it for about 2 hours and cleared the obstruction which was not easy (we would never have been able to do ourselves).
After he gave us the option of a camera going down and a full drain flush which would clear the drain completely but may or may not be required in the future.
My options were made clear, there was no high pressure tactics and Dan charged fairly for the 2 hours work plus travel time and specialized equipment he had to use. I also never asked the price before he started so he could have abused that trust and he did not.
I saw the one negative review on this site of his but did not feel that it was reasonable to expect a plumber on the road to fax insurance certificates instantly so I ignored that.
I would happily use his services again and recommend him. I feel I got good value for his services and he provided no incentive to write this review other than his good service.