I have a hard time imagining a situation where I would pay someone to clean a tank.
I don't. It'd be a situation where you could go down in the basement and view the bottom dwellers through 10' tall viewing windows. Then go back up to the first floor to view the other fish higher in the water column. To feed them, you'd travel to the upper floor and throw food in and watch them hit the top of the water. I'd gladly pay someone to put on scuba gear and get in to clean it. 
Fair enough. I guess the way I look at it is that I would not take on something I cannot care for myself, so I clearly did not consider something that large, and that being said, I can see where someone would get tired of taking care of something like that over and over again.
Interestingly, I just jumped over to Cichlid Forum, and they have an article about it on their front page, and I thought it might be worth giving a once over to see what they have to say:
http://www.cichlid-forum.com/blog/ocean-swipe-360-makes-cleaning-a-breeze/
C-F has always been money driven and therefore, I'd take anything you see there regarding products with a second of hesitation while you consider their interests. Through the years they've always been active about monitoring content. If you wanted to leave a bad review on their forum about it, it wouldn't last a day before it was removed, especially if they are a vendor.
Please do not mistake this as an endorsement, simply giving another option for someone to check out if they are interested in the topic. That and I think they beat me to posting it, and I have to give credit where credit is due. I was given the link by a coworker/boss who was actually seriously considering something like this.