So far, so good with Burkholder. Had them install an A/C and gas furnace last fall. It was installed quickly and properly and everything has worked fine. Recently took advantage of a free servicing and all is well.
UPDATE, 8/24: Just had a mini-split installed in our attic. Again, installation and service was top-notch. Kudos to Joe and Jared, as well as the whole Burkholder team.