Just set up last night, so this is early impressions. Out of the box, these units are pretty big. 9 inches tall and "bloaty". I don't care, but you might.

We have had our Linx Cordless Vac for over two years, purchased on Amazon. It does everything we expected and more. I have numerous cordless tools, and once the lithium batteries came out and with considerable experience with nicad and others the lithium based batteries beat the others in performance. The only negative I can add is that chargers can be designed and built to quit charging once the battery is charged, eliminating the problem of shortening battery life by leaving it in the charger. I don't know if Hoover has done this yet or not. However, for us, we knew this and do not leave a charged battery in the charger.