Overall this thing is like other customers said, a beast. It goes quite fast and is just way too much fun to use. I started with the S2 /solid tires so tires with air in them are awesome. There are some design flaws:
When you place the handle bar on the post its two soft metals touching each other and no matter how hard you crank down there is absolutely a possibility that you can just pull it right off. I did this right out of my driveway. To fix it I got a metal drill bit and put a "safety" bolt through the post so it will never ever come off. I adjust this when needed
2nd. : My rear tire has already become flat, dirty , debris in road I guess. That sucked and really deflated my spirit a bit. I tried to fill it with the "green slime" tire puncture repair with results that only lasted a couple of days. In the end I had to get a tube and put it back on with success.
To get this tire off and unbolted etc is a real task. I am an electrician by trade and have no issues with tools but this is a two person job. Getting the tire off not as hard but getting it back on , omg it was work. In addition you cannot disconnect the motor/wheel to work on it. I am sure if I took the entire bottom panel off I could find where it connected and remove it but its a tire repair, and im not doing all that. My solution was to get an angle grinder and cut a small slit in the bar that holds the wheel. They actually wove the power cord to the motor through the metal eyelets. I just have it zip tied now with no issues at all. A major project for sure.
The throttle could use some work as well, it is a bit jumpy and I rarely use speed 1 . Speed 2 seems to be my go to but on 3 its a blast as well. This scooter does not want to go slow it wants to eat road. As other reviewers suggested ride this like a surfboard/skateboard and you will have a better control while riding. It took me about a day and now I have zero control issues. I let the deck become my lifeline and it has not let me down. It is powerful though and I cannot say I haven't thrown myself off a few time. haha i know!
Other than the above this scooter is just way to much fun. It goes quite fast, has a nice long battery life and handles pretty much whatever I throw at it. The price range is really good for its features and I really did not want to spend upwards of $1500 for a high quality one, which there are many and they do have better designs. The display is super bright and clear, the operation is straight forward . Its got some weight to it so I don't bring it in stores like my S2, mainly just ride it on the street and in my local Pennypack Park in Philadelphia .
These scooters are just too much fun so its hard even with the challenges I was faced with to give it a negative review. In addition my buddies have really really enjoyed using mine and have since purchased their own scooters. We go for night time rides , day rides etc. I suggest bringing an air pump and a small tool collection for occasional bolt tightening etc. And while your at it bring some beers too, you earned it . :)