I had a Primaluna Dialogue Premium Integrated for a number of years. Really satisfying in late night listening but as some mentioned it did have limitations on headroom.
also I had a number of problems with Upscale Audio tubes. I got bad input tubes at least three times and they refused to do anything about it and just said our testing is sufficient. So not a great experience on customer service for tubes.
I eventually auditioned an LTA integrated and was blown away at the comparison between the two in terms of how much of a veil came off the music with the LTA that the Primaluna had. Maybe the auto bias, maybe the design, maybe the tubes, who knows but it was undeniably better with the LTA.