This is LONG overdue as the MHvT has already moved on to a new owner, however here is my review...
First, I have owned all three versions of the pedal - v1, v2, and vT. I have enjoyed them more and more as the design has progressed as the gain seems to smooth out and the EQ becomes more friendly (less low mid hump). v1 seemed to have a bit too much bite and treble for my strat and sounded somewhat harsh and clangy with my setup. Although to be fair, I typically ran it with the distortion past 12 o'clock which I've since learned is not where I prefer it for this pedal. Anyway, you live and learn but the first one moved on quite quickly because it just didn't sit well with my amp and guitar.
I received a v2 a couple months later from custom-sounds (I think) and found that one to be much more pleasing to my ear. The gain was smoother and you could get that kind of liquid lead infinite sustain with the tone turned down and the drive up. It was very smooth and I really liked it a lot, however, I sold it once I found out I was one of the "chosen few"
to get a crack at the new Model HvT. I had no intentions on selling at the time because I really liked the pedal and loved it for leads and driving the HBOD with it but I figured since I had the opportunity at the vT which had the same circuit with one extra feature (the treble trimmer) I should let that one go.
Finally, I got the Model HvT in the mail and no sooner did I get it than I heard there was a trim pot "upgrade" available if I sent it back to Donner who would in turn send it back to BJ to replace the trimmer with one with more range (I think?). Anyway, a couple weeks later Donner shipped it back and it got lost in the mail after resurfacing a little over a month later I finally got to plug my new and improved MHvT in. However, during the time away I had replaced my Dr. Z Carmen Ghia with a Fender Twin and a THD Flexi 50. In addition, I picked up a nitro DRD in that break and have really become attached to it. Anyway, I was recently finally able to sit down with the pedal and really put it through its paces and here are my thoughts...
First of all, I cannot tell you another pedal I've ever tried that has the distortion characteristics of the Model HvT. It's a unique sound that really seems to give some rumbling distortion to the lower frequencies and some "clang" to the upper. It is very dynamic although at minimum gain it still has a decent amount of clipping going on. With the treble trimmer and tone knob you can take it from amp on the edge of explosion face-melting kind of distortion to bluesy saggy drive (different than the HBOD "sag" but still a "sag" in the low freq's). With the treble rolled off and the tone at minimum you can get a fuzzy smooth distortion sound. With the treble up and tone up it goes to a biting distortion (not as "sharp" as the SYODv1 but in that vein). There is a ton of volume on tap and I never really pushed the pedal above about 10 o'clock on the volume knob with unity at around 8:30 or 9:00. An interesting thing is that there wasn't very much volume change with added distortion which is a fantastic feature (i.e. the drive and volume knobs are nearly independent).
My favorite setting: Volume just above unity (9:00), drive at 9:00, tone maxed and treble trimmer at about 75% (i.e. maxed then back off about a quarter turn). This gave a very dynamic distortion with quite a bit of bite in the top end and some sag in the bottom. The distortion interacted very well with the volume at this setting while still giving plenty of sustain and gain with the volume knob on the guitar maxed.
Why did I decide to sell? Well it's one of those issues of having too many toys at the moment. I decided that I would A/B the DRD and MHvT with my new rig and see what I ended up liking best. I didn't like the previous DRD that I got from custom-sounds with my old rig but I saw an older nitro one at a good price and figured I'd give it another shot with the new amps. Anyway, it sounds great and I like the tightness of it as a contrast to the HBOD's saggy loose feel. So I prefer it to the DRD to the MHvT for my board because it provides more of a tonal opposite to the HBOD. I really would like to keep it and if I were to try to use only one or 2 drive pedals, this one has the versatility to really do it all if need be. It'll be missed but if it isn't going on the board I am selling it as I, ultimately, would like to shape "my sound" which (sadly) cannot include EVERY BJFe drive or I'd be broke