I have and its a beast! Same rules apply though. 25w will not give you the punch and girth of a 100 watter.
With that said, I wasn't initially impressed with the 100w Badlander. Just like every other Mesa amp I had to approach it with a blank mindset and learn how to dial it in. I treated it like a standard Recto my first go around. I was surprised by the lack of wall of sound it puts out due to the much more tidy bass response.
After spending some good time with the 25w, I learned how to tune the amp properly to my liking and its a mean ass amp. Not sure if I want to pick one up for my collection anytime soon but its a worthy contender for a modern metal amp. If you like a lot of bass though, steer clear of it.