This one is more like how I use mine.
http://www.youtube.com/watch?v=m7a1P3EUiPw
What I like about the Metal End is the midrange options. The mid-range is surprisingly clean. I rotate 6-guitars when I'm gigging, so I need to adjust to each guitar. When you're going from single coil to Humbuckers, Dimarzio to Seymour Duncan, the mid-ranges change quite a bit. I have a Tri OD that I'll be adding to my board as well. But the Biyang responds well with my wah pedal. Better than the Tri OD.
To find a pedal with the mid options of the Biyang for $65 isn't very easy. Most lower level pedals just want to add a "contour" or "tone", which usually doens't sound very good. They always seem to dirty things up rather than just add a clean mid.
The high mid freq. setting acts like a presence knob. That's why I think you're hearing such a trebly bite in the other vids. Most Metal players commonly go for that sound and crank it up. And my guess is that's who the pedal is marketed to. But when you cut back on that presence knob a little, and add it to a mix, it can sound more like this (listen to the lead):
http://www.youtube.com/watch?v=lww4zwKbjYA
So yea, I found a good sweet-spot on the pedal, and depending an what pickup I'm using on any given night, I can make it warmer or give it a little more mid-range bite. I've been able to get any sound I want out of it so far.
Like I said, I do like your pedal, but I wouldn't have the time to put one together, and I don't have the money for a high end boutique. Given the circumstance, the Biyang was a great buy for me. None of my dist. Pedals seem to rob me of tone. True bypass isn't exactly a totally necessary thing to have. It's nice, but not always necessary.
When you're cutting through a mix, people in the crowd really can't tell a difference. I could use my X-Series Hot Rod and nobody would even know. But I need the mid-range to cut through. And I need it to be clean.