With 2 Roombas in the house, we had great expectations for the new self-cleaning Shark. Unfortunately,  the Shark R101AE stops during the clean cycle, rarely returning to its docking station. I find it in different locations in the den, with no real reason why it stopped. 

In addition, the Shark leaves clumps of dog fur (long coat Akita) on the carpet. As a result, we  have moved the Shark to the rarely-used living room, and brought our Roomba 980 back to the busy den. The Roomba 980 also has much stronger suction than the Shark.

The Shark was roughly half the price of an iRobot model with similar features.  With 20/20 hindsight, we should have waited for a sale on an iRobot S9+ or an i7.

You get what you pay for...