We have 20 acres of it. Planted it in a fertile field where the tile had broken down, so getting a good crop of corn or beans was getting dicey. It can take standing water for days, and not be harmed although it does grow best in the better drained parts. It also withstood last years drought and kept growing.
We started baling it last year instead of grazing the first cutting, just because it worked better for us to hay it and graze the cool season grasses in the spring. We can then graze it another time or two during the summer. We cut it before it heads out so it is much shorter than that picture. We graze it somewhere between 12-20 inches, and take it down to about 6 inches.
It has been a monoculture until this year. We decided if we're going to hay the first cutting then we will be burning it less often, we'll have to play that by ear. If it's not going to be burned then we thought we'd try seeding some clover in the field to supply nitrogen. The clover is growing good, we'll see how it does.
Palatibility --that was our only concern before planting, not after we started grazing it. We do MIG with fairly good fences around the perimeter of the farm, a few good fences dividing parts of the farm, and single strand polywire subdividing those parts into different fields & paddocks. Once the calves get a taste of switchgrass, that is where they will be found, going under several polywire subdivisions if necessary. The cows slicked off fast when we used that field as the first in the rotation during breeding season. Now we reserve the hay for weaning time; made before heading out, it's tender and smells great, and the calves really go for it.
The first few years we did use 2-4d or Banvel(have to ask husband which) to control broadleaves and also applied N after first grazing to kick it in gear. I think atrazine is labeled for it pre-emerge also.
edited to add: burn the old stuff or cut it, the cows do not like to graze the new growth with old growth standing upright. Also, too much dead stuff on the ground is detrimental to a stand, it needs to be burned off or hayed off. It also needs to go to seed in the fall to allow the plant to mature.