Sub standard not at all.
There is a particular 9” head carpet brush that can be modified easily to rip right thru the stairs. Scrubs the bull nose nicely.
I agree the 10”
crb does a great scrubbing job. I’m just not spending that kind of money then setup time….when the right modified brush does a faster job. Cleaning results after flushing results are just as good. Works for me. May not work for others.
Most home owners wait too long for stair cleaning. The damage is done by the you get the call. No matter how much scrubbing with brush or cbr, will not make em look like new again. You can make em pop though. Each home is different, carpet quality etc etc.
teflon
glide on stair tool has my attention. Just wondering if it’s worth losing that little bit of extra agitation from the metal lips.