I have one of these. The motors have broken frequently, requiring it to be shipped to a New Jersey service center - Aquatic Distributors - for repair. On one occasion, the repair center wanted me to pay for shipping the unit back to me. Now it is out of warranty and parts are prohibitively expensive. The Aquatron Aquabot Viva and Bravo are manufactured in Israel, and are apparently re-cased versions of the Blue Diamond cleaners made by Water Tech. The Aqua Products company manufactures "Aquabots" as well, although the product line looks different. Although this was not true a few years ago, Aqua Products shows the Viva and Bravo on its web site, despite the different lineage.
Aqua Products has service centers that repair their Aquabots, but not Aquatron Aquabots, so shipping the Viva may be the only way to get it fixed when it breaks.
The Aquatron Aquabots are reportedly produced by a company owned by the son of the original owner of Aqua Products. To confuse matters further, Aqua Products has now been acquired by Fluidra, another company that manufactures and distributes a variety of pool and water-related technologies.
In any event, the Viva may do a good job of cleaning, but at least in my case the machine was very unreliable, and I would not buy another one. The Aqua Products Aquabot that I bought it to replace has, on the other hand, been very reliable and is much less expensive to fix