I've never even used a chainsaw before today. We had a large branch fall from a tree during the storm and a hand saw just wasn't going to cut it. I bought the 40v battery powered ryobi. I waffled a little on getting the 18v, because then I could use the batteries in my other tools. I think I'm glad I got the 40v, because it had some other features as well and it cut super smoothly. Only draw back is only have one battery, so once it's spent, it is a 90 minute wait for a recharge.