Well I guess I'll throw my two cents in here. I have only used a MMM on CUT breifly (a B7100 as part of my test of the machine before buying years ago). I liked the way it worked and thought it was a good idea. It seemed to mount and dismount from the machine ok as compared to other attachments. BUT I decided for the size of my yard, I would use a dedicated mower, and spend the $2,300 on other attachments. I never regreted the decision, but I wanted a mower for my 'bota. So I recently bought a B6100 used with a kuboa 48" RFM, and a Woods RM550. Should have kept the B6100 but that is another story. Anyway I have two sizes of RFM. I currently use a Kubota lawn tractor with a MMM, and the woods interchangably to mow. Frankly, the woods does a better job, and if you can drive your tractor with almost any attachment on it and not hit things you will not have any problem with a RFM. I find the RFM better for getting under things and the MMM better for mowing around things. Mowing the grassy parts of our place is not easy and it's cramped but the B2410 with the RFM goes anywhere, and sometimes it goes there with the loader, because I just get lazy sometimes and don't bother removing it. Good luck.