I have that Riobi 40v mower. It is well designed and quiet. The only thing is doesn't do well is cut grass. I have to go over my lawn several times to get a decent cut. I tried different mowing heights, sharpening the blade, and walking slowly, but it still gave me a poor cut. I talked to Ryobi, and they said to buy the more aggressive blade, and sent me a free battery for my trouble. Then they asked me to remove my critical review on the Home Depot site. I told them I wasn't comfortable doing that and asked if they wanted their "free" battery back. They told me to keep it. The customer service people were nice and helpful, but in the end I still have a mower that doesn't cut grass very well. If I had it to do over, I would go with an ICE mower.