I have the MXR Duke of Tone and I love it. I run my Express mostly on the clean channel use the DoT to boost my other gain pedals (Keeley Super Phat Mod and El Rey Dorado) but sometimes use the amp's Burn channel too. In OD mode, the DoT has a little more bass and less mid boost than a Tubescreamer. In Distortion mode it actually has less gain than OD mode but uses hard clipping diodes which gives a more aggressive highs and even more low cut. Into a heavily distorted amp, it's a killer sound. With the internal trim pot for adding high frequencies, it's quite a very versatile pedal. (The stock position is minimum extra treble, and in OD mode that's also closest in tone to the original Bluesbreaker pedal it's based on).
