We demoed one for a day last fall.
likes; weighs less than the competitive drapers. no hydraulic pumps, motors, reservoirs, hoses, etc.. no funky giant spring linkages, no worrying about frowns, or smiles.

it’ll cut as close to the ground as you want, it cut so close that I was running the auger wagon and I had a hard time lining up to the combine because I couldn’t see the stubble to find the rows. There is a module that is installed in the combine that allows you to adjust cutter bar pressure (air bags) from the cab, it also monitors header height I think (I really didn’t get to play with it)

has a integral rock trap on the center belt that does a pretty good job at catching muskmelon size and smaller rocks, and believe you me this thing will pickup rocks.
Has a integral slow speed transport that looks to be kinda nifty.

cons; not many really, I wish I would’ve had the demo guy take out and reinstall a sickle section, the sickle backbone sits on top of the sickle sections so I’m not sure if that’d lend itself to ease of replacement.
alot of belts and jack shafts, not always a bad thing, but not always good either. The sickle drive is offset, and that in itself isn’t a deal breaker, but the way they drive the sickle kinda leaves a “gap” which they try to compensate with a goofy looking crop lifter/divider thing.

overall we were impressed with it’s performance, but one thing that kinda bugged me alittle bit, every-once-in-awhile it’d leave a totally unmolested soybean plant, pods and all.....it would vary in the field to none, to about one in a square yard ........couldn’t figure out really what was going on, it was like the bean plant was laying flat and popped up after the header went by...
to be fair our auger heads were doing too.

it still is head scratcher, that I’ve never seen before, that I was hoping a 90k head wouldn’t be doing.