After getting a deal on the Aquacritter ($89 shipped if I remember correctly), I received it about 3 weeks ago. But I just opened it today. From box opening to time it starting roving around and spotlessly cleaning the bottom was about 15 minutes and that was me just taking my time and stopping and yelling at the dogs to quit bothering the neighbors new dog.
I didn't realize how good a machine this is. I used to think these were one of those pulsating suction vacuums that kind of bounce up and down... which basically... well I had one and used it one time because it did not do even a moderate job.
But just in 10 minutes, this Aquacritter has really impressed me thus far.