I played the MB for a year+, and still have them as my backup/travel set.
It is a smaller head than average, be warned. Distance is good with the strong lofts. Not much offset. I love the long irons, and had some inconsistencies with the short irons - not the heads, but my ability to be consistent with them.
I haven't played the CB, but they have more offset, larger, and definitely more game improvement.