First post, but not my first trip to the boards here.
I own about 22 different keyboards and about 40 difference mice. I had been waiting for the QFR-i for a while. I have 5 other CM keyboards and was looking forward to a tenkeyless keyboard from them with backlit keys.
The backlit is a nice addition and the obvious new feature, but the item that I didn't expect to change in their line-up and definitely didn't expect it to bother me as much as it has... the USB cable and plug-in location on the keyboard.
The normal location has been tucked away underneath the keyboard. the new location is on the back of the lower assembly, right back corner centered beneath the 'scroll lock' key.
This wouldn't matter 'that much' if the cable that came with the keyboard had a 'straight' connector. It doesn't. It's a right angle connector that bends to the right. In some scenarios, this cable can interfere with your mouse cable. I would strongly recommend an aftermarket USB cable OR some nice cable mgmt.
If you are someone that uses any kind of keyboard tray or scenario such as a mobile cart, the way the new connector is situated may prevent you from using the device. I really do with the connector was tucked away beneath, or at least centered on the back of the unit.
I did replace the keys with some nice white PBT keycaps. The glow is brilliant (sorry no photos). My only regret is that I haven't purchased buffer-rings yet. I went with cherry mx brown switches for the workplace, and I tend to bottom them out.