Another swisher owner here. I picked up the 44" rough cut a few years back. Pulling with my ATV. Really put it to the test cutting some trails.
Last year I purchased a SCUT with a rotary cutter. Planned to sell the Swisher, but never did. While I love the rotary cutter for most work, the swisher can go to many places (inclines) that the tractor cannot.
The Swisher is a very good unit and the support the company provides is excellent.
If you are cutting through very rough stuff, you will go through belts. As someone has already pointed out, changing the belt could be much easier. Learning to make adjustments to create proper belt tension will increase the life of your belts.
Initial setup does require bolts to get the initial height set for the hitch. After that, cut height can be adjusted by turning a crank (unless they changed the design in the past few years).
I run my on inclines without a problem. Mine is set up with a slight offset, which allows me to get into some hard to reach places. For example, I can cut along the edge of my pond without driving the vehicle precariously close to the edge.
Using this on an ATV, I am able to reach back (while seated) to engage/disengage the blade. ATV size and arm length factor into this.
No experience here with other brands.