I had the Subway D800 for a few months. I already had a Bugera Veyron 1001M and an Ashdown Retroglide, but was curious about the Mesa. I loved it at home, the Voicing control was great, and the Deep switch was warm without being boomy. First time on stage, I had to turn both off as they did not suit me on stage. I was effectively running flat, something I could do with both my other amps. Of course, as our US friends would say, Your Mileage May Vary.
The Ashdown (uses the same ICEPower module as the Mesa, although the MESA will drive 2 ohms) and the Veyron both meet my needs and although the build quality of the Mesa was great, it cost twice what the other two amps did so it was sold.