The Good: The Fit Wifi frame in 20.75" is my current frame and unless it breaks, it will be my frame for a long time, I may even get another after this one. I primarily ride street and park , and with the shorter rear end length and steeper head-tube angle of the WiFi I've found it very quick and responsive, without being squirrelly. This is a very durable frame and has yet to show any concerning signs of wear, (for example I bounced the DT off a ledge pretty hard yesterday and it barely dinged it). The geometry of the WiFi is what stood out to me most and is the main reason I bought it, also the price is very reasonable on them. I like the shorter rear end more for ease of getting up onto bar/over bar height ledges and rails, for me it's easier to suck up the rear end on a shorter frame, but also it's been great for spins and manuals without having too much a tendency to get loopy.
The Bad: Not made in U.S.A.... That's about all I can find that I don't like , but it also would've made the frame more expensive to make it here so it's really not an issue! Maybe some more color variety would be cool too!