This company was perfectly professional in every respect from setting appropriate expectations while quoting, to performing the work, and following up after the fact with re-sending the invoice I had misplaced. They were a pleasure to deal with: professional, honest and thorough.
As to the quality of their work: hard to no for sure. We're pretty sure the insulation they installed helped and we obsessed over measuring our home before and after they installed the AirCrete between our double brick walls. Despite this, we lack the numbers to be 100% confident it was worth it (we're scientists and wanted better data than we could collect). That being said: we would use them again because we're almost certain it was worth it.