Old thread, and I think folks who have had CR's a long time are good to hear from as well as those who hate them. Like one of the previous posters, I don't use mine around the house...way too much dust. I use a dustmask when using the CR. I use it when mowing high grass, leaves, and pine needles. I purchased the CR Commercial with the 6 HP tecumseh engine in 2003. I've used it on two mowers, including my current 60 inch ZTR. It does great for what I use it for (high grass, leaves, and pine needles). I have a heavily wooded yard (4+ acres) and I can keep the whole place looking clean bagging once a month and mowing weekly in the spring and fall. I used the vacuum and power unloader as I have a low spot where I just blow the bag empty when it contains leaves and pine needles. Cut grass does not work well with the power unloader/vacuum and I use a pitch fork to unload.
For me, this is better than the OEM bagging system that either mower offered. I hate when the plastic screen on the top clogs. I have two brushes, a stiff bristle brush and a metal brush. High grass is the most labor intensive, as it clogs the top screen in about 5 mins of cutting. Btw, high grass for me is 12 inches or taller. Once I get done with the job, it looks clean. I had buyers remorse for 2 years after I bought it, but once I put it with my ztr, I was able to appreciate a bagger that could suck down the discharge of a 60 inch deck.
It's not for everyone, and I am now happy with how it works for me. I will probably upgrade to the 415 gallon bag next, as I can fill it up in about 20 minutes during spring and fall mowing days.
I will say this about the impeller, considering all the things I have sucked up (rocks, sticks, glass, sand), the CR's impeller is high quality in my opinion. If mine goes out, I will buy another CR.