Pros: After deciding to make the plunge on a mechanical keyboard, I came up with several requirements: 1) Cherry Brown Switches: they seemed like the sweet spot for typing comfort vs noise. 2) Wireless with nano-receiver: I've used wireless keyboards for years and didn't want to give up the convenience. I like to leave the nano-receiver plugged into my laptop, so I can "dock" at my desk without plugging in yet another cable. 3) "Small" enter key: I hate when keyboards have Enter keys that take up two rows and move the backslash key somewhere inconvenient. 4) Number pad: I use number pads often enough that I need one, so the compact layout keyboards were not an option. The U9W met my requirements and was one of the cheapest mechanical keyboards I could find. I was a little worried that it was a deal too good to be true, but that was not the case. I've had it for nearly a year now and it's been great.

Cons: I would have liked to have a couple media keys (Play/Pause, vol up/down), but that's a minor thing. The wireless range isn't terrific. I'd say anything more than 8 feet from the receiver can cause intermittent loss of keystrokes. Fortunately, I'm using it with a laptop that's never more than 3-4 feet from the keyboard.

Overall Review: The reviewer who claimed that the USB cable fixed his stuttering needs to replace his batteries. The manual states that the USB cable carries no data, and that it's only used for powering the keyboard.