Purchased 2 units and used both for 3 rounds now.
Navee #1 - Texas
The first one, I returned. Used it 3 rounds in flat Texas conditions. First round, Cart died approaching the 18th hole. The next two rounds in Dallas, I was able to finish 18, but battery will not get close to 36 holes as advertised. Each time, I had to either push manually or get a ride back to the house.. The house is about 400 yards from the first tee box.
Navee #2 - Colorado - 8400' Above Sea Level
So far, I've made it for 18 holes without it dying. Always gets to the red battery indicator as I finish the round. Again, No chance of 36 hour battery life as advertised. This course is hilly, up and down, but cart works well and will keep it. Wish I had an additional battery to not fear having to push this cart for a hole or two.
Overall, it is convenient.. Follow me is a 6.5/10. Be very cautious of where you walk. Even some small holes will make the cart flip. Walking around hills, mounds, tall grass... Wheels will spin out and the cart will get "lost" and flip over. Always keep an eye on it. At my Texas course, the follow me took a 90 degree turn straight toward the water on a flat par 5 as I was walking down the middle of the fairway..
It is a bit of a learning experience.. Always keep your eyes on it! Hopefully larger battery options become available.. Wider/more rugged wheel options would be nice too. They do not have the best grip.. Kinda slick rubber