So I bought the board because it was one of the few wireless + backlit mechanical boards at the time. I wasn't expecting much because of the Chinese brand & Morphling/Plum isn't widely known/renowned for quality or high-end products. But as long as it was backlit and wireless I'd be satisfied. I went through imsto, and the process was very easy and satisfying. Many thanks to imsto, 10/10 proxy, and I hope to do business with him in the future.
The keyboard was alright, some of the key spacing was uneven, and it felt somewhat cheap. I ordered it white, with mx blues, and it came correct thankfully. After a few weeks of use I ordered a set of double shot PBT keycaps. That really changed the board from feeling like a cheap product to one of somewhat quality. It was much nicer to type on, and the key spacing was greatly corrected. The spacing is still off by a few thousandths here and there, but it's not very noticeable, and doesn't bother me.
Wireless function is somewhat problematic. The keyboard didn't come with a manual, but after searching I believe fn+f12 puts it into pairing mode. The wireless function was initially almost unusable. Many unintentional key repeats (repeats of the repeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeat variety, not simply "repeeat"), and other bugginess. I solved most of this by changing the key repeat delay in Windows 7 to (100% "long") & key repeat rate (75% "Fast"). Now I can type fairly long documents without fear (such as this review). I still connect the USB cord for long documents & gaming. I like the placement of the arrow keys (switch them on/off with the NUM lock). Everything else is laid out well as well. Only remaining bugginess is sometimes "\" will stick itself on and I have to turn the board off/on to reset it. Wouldn't be bad at all except the switch is small and in a hard to reach spot on the back.
^I also use a wireless Logitech G602, a wireless Xbox 360 controller, and have my wireless/bluetooth desktop 2 feet away, combined with a bluetooth headset, and phone etc. there may be a lot of interference affecting my situation.
Overall I'd give it a 7/10 stock, 8/10 with a different set of keycaps, and imsto a 10/10. Think I paid ~$100-125 for it, and I think that was worth it. Overall I'm happy and looking now to install some LEDs and get a couple more keycap sets to play around with. If I could change one thing it would be the wireless function (maybe use bluetooth instead?) and a second would be to make the 3xAAA batteries easier to change (you have to disassemble the keyboard) but they last a while (weeks+) so not a huge deal and it encourages me to clean it more often anyway.
I'm looking into getting a Choc Mini 2M to compare, but the Plum is a fine keyboard if you're willing to deal with some quirks.
Thanks imsto!
edit** fn+f12 switches between NKRO & 6KRO. It may also enter pairing mode when held down.