I have that Calumet boom. In fact, I just set it up in the garage about 20 minutes ago (I've got a sitting this afternoon). I use it with a Calumet stand (6040) but it's not an air cushioned one and I don't have the casters. The boom is nice enough but, if I had to do over again, I think I'd prefer one that is telescopic. This one is in three sections and snaps together. I don't know, maybe if I tried a telescopic one I'd prefer the Calumet one?
One thing I really like is the counterweight. Unlike the ones that use a sandbag-type counterweight hanging off a hook, the Calumet one has a weight that clamps anywhere you want to put it along the boom. It makes it easy to adjust the balance so your light stand isn't bowing one direction or the other.
All that said... The Calumet boom seems a bit pricey. It sells by itself for more than $100. The weight adds to the cost, I'm sure, but I think there are probably better booms out there for the money. I remember seeing a Manfrotto set up in a photo store shortly after buying the Calumet. It included a telescopic boom and the light stand for around $140. That might have been a better choice but I don't have personal experience with it.
Mark
"If a day goes by without my doing something related to photography, it's as though I've neglected something essential to my existence, as though I had forgotten to wake up."
-- Richard Avedon