This made me look it up as well, and I cannot express how disappointed I am that it isn’t a grinding sound.

I’ve had the same experience. I splurged a bit and got one with all the bells and whistles (warm water, heated seat, etc.). It’s such a shockingly significant improvement to something I do daily. Couldn’t imagine going without it now. I can’t believe they’re not more common.

The title could really use an extra comma and some quotation marks…