I highly recommend this game, guys. The manual swinging/blocking mechanics are great, and makes even a jaded gamer feel a rush of adrenaline. The SP can be great fun, but the UI can be annoying unless you install a few mods.
MP is a blast, and it's worth buying M&B if only for the cRPG mod.
EDIT: Sidenote... cRPG is getting a big patch in the near future that should make it a lot easier to get into. It will be very easy to get XP, until you hit a softcap, so most players will all be around the same level pretty quickly.