Absolutely! I haven't timed it lately, but I really think removal is only about 4-5 minutes... putting it on takes a bit longer, due to getting the driveshaft rotated correctly so it lines up; I put some white-out stripes on it to help in that regard. I don't have a lot of experience with 3-point hitch devices, but it takes me 20 minutes --at least-- to put on my tiller. For me, MMM is far easier to install & remove.
The nice thing about these MMMs is that they do such a nice job of cutting grass --very smooth, no "misses"-- and I haven't had any trouble with relatively high grass --though my grass tends more to dry rather than wet, which I know makes it easier.
I also removed the flapper door altogether, mainly so it will fit in its narrow parking spot, but discovered the grass clippings also get dispersed very well as a result; no windrows. (Also works great to blow leaves & debris- that thing makes quite a lot of wind!) WBB