I have used one from that company. Really liked it, shame I had to give it back when the owner had a yard again. Pricey but very nice. Battery lasted well in the model I used and it recharged in about 30min.
Down side is the price of a spare/replacement battery. Might as well buy another mower for a few bucks more. Then again, thats how it seems to be with all the battery mowers. When the battery dies, just replace the whole thing?
Tom
PS: I have another battery mower that's not as nice, but works. Needed a new battery pack...GUZZI CONTENT... The new pack was about the price of the mower. Open the pack and found 2 bike size batteries. Found the same or better on Ebay and instead of about $200 for a pack, spent about $75 on a pair of batteries and put them in the pack.