The Black & Decker Scumbuster Xtreme Cleaner, S700E is an Overpriced Underpowered, Waste of Money. It is actually a good idea, just extremely poorly executed. I bought this through another site last year at about the same price. I downgraded my initial 3 star rating on it, after trying repeatedly to recharge the battery and try again. This is very under powered. I attempted to clean a bathtub with it, finally just lettng the scrub Brush rotate in one place for about 3 minutes. That was the only spot that actually got clean. I had pre-sprayed the area with cleaner, letting it sit before attempting cleaning. The brush rotates slowly, and will come to a stop if any significant pressure is applied, so the cleaning effect is minimal and slow. The only good use I found for this was using the rounded tip in the inside bottom corners of the Shower surround where it meets the tub. That is a fairly sharp rounded area that is difficult to clean with anything else. After finally giving up on this after the third attempt to clean the tub, I sprinkled old fashioned ammonia cleaning powder, and water, got a manual scrub brush, and had it sparkling in less than 5 minutes. I do not recommend purchasing of this product.