The Busker and Michael Messer guitars were made in the same factory as the Republic guitars, though they aren't now, because of quality control problems.
Both Michael Messer and Robin (of Busker Guitars) are incredibly helpful and go out of their way to sort out any problems. Busker check and set-up the guitars (MM guitars too) before sending them.
I had an MM Blues reso, but didn't like it, and sold it on. I'd like a Busker Delta, but unfortunately they've stopped importing them. The MM Lightning is very popular and sounds good.
Lightning played by Gerry Cooper
http://www.youtube.com/user/Gerrycoo.../3/KVsb17u8McE
MM Blues played by Michael Messer
http://www.youtube.com/watch?v=jjTS97WXc7c
Lots if advice here
http://michaelmesser.proboards.com/index.cgi
Best of luck!