I've used Wojo's Heating & Air Cond before. They came to me are well recommended and they worked on my stepmother's furnace, they out a new unit in for her and they took care of things when we called them.
She had a hot water tank put in by them also and that was a few years ago. I've used them recently and I was also satisfied enough. I usually hire people, I believe in doing everything myself when I can but if I have to get somebody, I expect them to do a good job. Wojo's Heating & Air Cond. did a good job.