I use a 60" mmm with my B3030HSDC. It is very easy to connect up the linkages and shaft to hook it up because there is lots of room under there to work.
Although its quite easy for me to connect it up, it does weigh a few hundred pounds and has to be pushed under the tractor to get it in place. It has swivel wheels on the front which help, especially if its on a smooth surface but if you have a bad back or something, it might be a chore to move it around and muscle into place.
For comparison, I found the deck to be heavier than the deck from my BX so harder to move around on the floor, but found it easier to connect up the linkage and the pto shaft once it was in place because there is more room to work under the tractor.
Someone smarter than me has probably devised a dolly to use, but it hasn't been enough of a pain for me to build one yet.