I love mine, 1500 miles since January 2017. I have had to replace the kneebar twice due to the orange “collar” deteriorating which led to metal failure where the top section bolts into the bottom section. I’ve since found a brace on eBay that seems to work OK, I recommend installing one right off the bat.
The tires wore down to the threads at around 1400 miles, tire slime took care of all minor leaks along the way.
My wife and I had so much fun when we were vacationing in Denver earlier this year and we did a Segway city tour with a group of 6. I would like one of these but it would have no practical use where we live. I notice that this model is the miniPRO320 with the larger capacity battery, unlike the 2018 miniPRO260 with the smaller battery.