The mower is a success. I did the entire yard and used up about 25% of the battery so I'm thinking that it will work well for years. And so much easier than the push mower through the thick grass. It will take a few weeks or longer to get the grass at the right height but it is so easy to cut with the mower that I'll likely cut it more frequently, something that grass likes anyway.
The best thing about this mower is that it cost me nothing. I bought it with saved up proceeds of my Prolific surveys. Such a deal. I'm starting a new savings pot in Prolific, this time for a couch in my office. So, bring on the surveys!