This amp is really well designed and looks really good.
Tone wise IMO, very vintage oriented. Too much to my tastes. You can get rid of it thanks the great semi parametric EQ. But with only the 3 bands EQ, I couldn't get rid of that typical vintage tone. I'm really used to the massive super clean tone of my Ampeg SVT 4 Pro, and the M-Pulse was very different from that.
However, the 4 or 5 buttons (depends of versions) footswitch offers a lot of control. Way more that the newer Carbine series (only 2 buttons).
I traded it for the Carbine M9 and will never look back.
If you are after vintage tone go for this amp, you will love it.
Mesa Boogie M-Pulse 600