I use this bike to get around New York City. It's the first bike I've bought for myself brand new, and it's exactly what I was looking for. First off, it's very sturdy. The city is hard on bikes, but this thing can take it. I've flipped the thing (my fault, not the bike's), had it land in front of me, and it took barely a ding. Stayed unfolded. The fat tires are great for potholes, and the kevlar belting gives you a little piece of mind as you fly through a minefield of glass shards.

The folding feature was the main reason I bought the Jack, and it was mainly to avoid theft. First and foremost, I can keep it in my apartment. That's a huge plus. Second, the tires are right next to each other when the bike is folded, which allows you to throw a chain or cable through both tires, around the frame and even under the seat if you prefer a quick release (the bike comes with QR levers on both tires and the seatpost). I can get a kryptonite chain around the frame and through both... Read more

N. James's review is right on. This is a solid bike. I am a simple man, and I always hated looking at bicycles with my more knowledgeable friends, because they tend to go on at length about getting the best tires, the best handlebars, the best frame, etc. I just wanted to find something sturdy that rode comfortably, that I could fold up (a necessity for most of us in NYC), and that looked cool.

This is it. If you're a hardcore cyclist, this bike probably isn't for you -- but then, you probably know exactly what you need. If you're like me, just someone who wants a functional, dependable bike without a bunch of extras, do yourself a favor and take a look at one of these. (And don't be put off by the folding aspect! I'm pretty much technically brainless, and I was deeply doubtful about whether *I* could fold this bike in the "super-fast" five seconds mentioned in the product description. But it really is that easy. A monkey could do it without a hitch. Heck, my cat could do... Read more

Pros :
Excellent build quality.
Pretty light 26lbs ( for a foldable ).
Fantastic ride.

Cons :
In high demand. I had to wait over a month for mine.
Lowest gear could be easier. I live in San Francisco so very steep hills are a little bit harder than they should be but it's not bad and should not dissuade you from buying this bike.