I'm 6' tall and around 235lbs. I had my doubts. This eBike seems to work just fine. Although I have not put it through the ringer yet. I have only assembled and driven for about 10 minutes. Initial thoughts. The packaging was NOT sufficient enough to keep the seat from having a 1-inch tear in the material and the rear post reflector from being damaged. I have started communicating with Windhorse but it's to soon to judge customer service. Was this because of packing or poor quality control when examining the parts being sent...I do not know. UPDATE: I called the manufacturer/sales people direct. I told them the seat arrived torn and a reflector was broken. I was told they had them in stock and would send them out the next business day. Weeks later, I have seen nothing arrive in the mail. I would say they are not very responsive. Beware if you need support after you buy.
The first impression is that is seems to be built fairly solid. Other than the couple of things mentioned above, everything seems to work great. I initially charged it for about 2-hours to gain a full charge. I inserted the key and tested the lights and the battery level. Everything worked fine.
I proceeded out and down the driveway to the street. I drove it around 4 blocks, about 2 miles and the only issue I had was the seat post. It kept sliding down at a very sneaky-slow rate. I figured out the problem when my knees began to hurt, lol. I got off, loosened the post lever, then tighten the screw about a full turn, then clamped the lever back down....no more problem. Yay me!
I tested the brakes and the speed. I would say that 15 mph is about the maximum speed you will go. It seemed like a comfortable speed and I did not feel as if there were any control issues when leaning, or turning. By no means do you feel like the bike is going too fast...it just felt like a normal bike ride but without the peddling. Although, you could peddle if you feel like it. It is one standard gear if you want to peddle.
Lastly, you should check all screws "before" riding. Even though you would think a brake lever would be securely fastened, it was not the case for me. I had to tigten the nut or the lever would just flop. Also, the handle bar was rotated 90 degrees forward (I guess for shipping?), I did not notice until my palm felt awkward as the blade/flat area of the grip was vertical (not flat like it was supposed to be) and it was jabbing into my palm. So, take time to loosen the handlebar lever and rotate the handlebar until the brake and grips are to your liking....before driving off into the sunset.
As for foldability, it is absolutely foldable. There are quick levers to fold the bike frame in the middle, a seat-post lever to drop the seat down fully or remove it, a front steering post lever to fold the front post parallel with the body. The handlebar lever...well, not sure other than for convenience as you won't be sliding the handlebars off without removing a bunch of cables and grips and electronics. I guess that is for simple adjustments for your comfort.
If I have more to say after a bit more time, I will update this post. The one star I took away was for the two damaged items (seat torn, and reflector broken)....this is minor and I assume the company will work with me replace them. I would not be deterred from purchasing this item if I needed a second eBike.