ZUAIAI Cordless Electric Spin Scrubber - 6 Replaceable Brush Heads with LED Display & 2 Speed Settings for Bathroom, Kitchen, Tile, Shower Cleaning - Perfect for Deep Cleaning Grout, Tubs, Floors and Hard-to-Reach Areas

I'm shocked at how great this works. I've tried it on tubs / showers, sinks and windows. They were shining after with virtually no effort. The initial charge took a bit longer than I thought, but now the charging is pretty quick. If I had to say something negative, the "Floor mop" is WAY too small to use as a regular mop (unless you have 17 hours to kill). Comes with a few attachments even though you probably won't use most of them, but still nice to have.