All of my comments may have been covered previously, but here goes.
I have the older, smaller, red version. It's about 8 or 9 yrs old. Works great! No gas, oil, spark plugs, rust, noise. Mine has been outside most of all summers (I bring it in when raining because of the elect.). In the winter I fold down the handle and store it upright in my laundry room. Since there's no gas etc, you can bring it inside and not worry about it.
Re the smaller cut path, if you don't need a little extra exercise, then buy one of those big noisy, riding mowers :-{
One suggestion, which may not be applicable to the newer models: Take the top half off once or twice during the summer - you'd be surprised how much dust and small grass clippings accumulate inside (where they're not supposed to be).
Re time/area available with the battery. This is supposed to be for an average 1/4 acre. If you want to do more, keep an extra battery ready. I find that my battery is so good, I keep wondering why it won't lose juice so I can take a rest :-} I just replaced the original battery this year - my old one lasted 8 yrs! - you have to run it down and recharge completely (out of the mower is better/faster). And charge at least once during the winter when not using.
This is so much better than the regular gas mower I had previously. I would never buy another gas mower. I love my Neuton! I would buy a new one in a heartbeat, but I can't seem to kill the one I have.
BTW, a few years after I bought mine, the company sent out a new circuit board to upgrade. Since I didn't care about the safety features etc, I just hardwired the motor to a switch that I placed on the side of the handle. Now it's just on or off.