I bought this scooter for my 6 year old son since he wanted an electric scooter like Daddy's!
It's extreamly easy to build and comes with all of the tools needed to complete the job. My son and I did it together in under 30min. Essentially connect the front wheel and tube to the scooter, pop on the handle bars and you're ready to go.. You do have to top off the battery before the first ride.
As far as riding goes, my son is 6 years old and it took him a few trys to get the hang of putting his feet on the buttons. This scooter has a forward button that requires one foot to be on and a rear button that requires the other foot to be on in order to accelerate. After about three tries he was riding like a pro. The buttons are a nice touch for safety and also disengage the acceleration of the scooter once the rider pulls their foot off, generally to hit the brake which is located over the back wheel. Another cool safety feature is the built in lights, especially with it getting dark earlier in the day now that its November, it makes it much easier for other people to see you.
My son and I went for a ride around our local park and rode about 3 miles with no issues so battery life seems good as well.
It's easy to store, easy to put together and relatively easy to ride in our experience. I'd definitely buy another one for my 4 year old once he's ready for one. Definitely recommended.