Can't Recommend It Enough... I use it about twice a week or as necessary and it does a GREAT job.

I purchased the RL-500 three years ago. I am soooo happy with it and can only imagine that the newer models are even better. As far as battery life, it mows for about 3-4 hours on one charge and can cut most of our 3/4 acre yard in one afternoon. I use it about twice a week or as necessary and it does a GREAT job. I highly recommend the rapid charger though if you have a large yard. It takes a full 24 hours to charge without it. (Cars actually stop and back up to watch it, it's too fun!) (Amazon)