It's powerful and very loud
Now that I've had the Bison home for a few hours & actually did a little vacuuming with it. I can understand why these Bisons (a wanabe Kirby) didn't quite have the high volume sales its CEO/inventor had hoped for.
Powerful it is. However, the machine weighs a ton and is difficult to manouver
on thick padded plush pile carpeting. First time I've ever worked up a sweat vacuuming.
I did install a new belt(a Kirby belt fit just fine) and that unto itself was quite the task. Had to remove 4 screws from the brush roll guard plate, then pull the plate, pull the brush roll out, place the new belt on the brush roll. Then reattach the guard plate with its 4 screws,then stretch the belt over the belt shaft. Unlike most uprights the Bison has direct drive. It has a drive shaft that inserts into a gear located in the nozzle and this gear then turns and rotates the belt and brush roll gear(s). Not your typical easy belt replacement for the normal housewife I must say.
All in all its a very unique powerful machine. A vacuum that one should really just admire as opposed to actually vacuuming with it.