I think there was something wrong with the cable, whenever I move the cable, the connection just simply cut off. Have to twist the cable in certain direction then can connect the keyboard...

Then sent back for RMA, waited for 3 weeks then he say the keyboard ready already. Paid the shipping for him to ship  back, wait another week again for him to reply. After that when I received the keyboard, found that it is MX Brown
... I got a little anxious then I send him like 2 emails about the issue (also politely asking him to improve a bit), what I get back is a reply like "just return to replace", "stop sending emails about improving aftersales service and look at the calendar before you email, we don't work on weekends"... Seriously 

Then I was like okay, ship back again... Then for some reason the Poslaju cannot deliver the keyboard to him, 2 times, both on weekdays (I doubt he also close shop on weekdays  )
Then email him again to tell him about this, he say will go collect. Then one whole week no news from him... Email him again then he tell me MX Blue no stock...  Kinda fed up already then I ask for refund 
Anyway, I am now considering Rosewill RK9000, Ducky S2, CM Trigger, CM Rapid, or KBT One/Oni... 

Definitely good to get, I just got my brown switches one, white LED. Feels not as solid as the QFR, but the standard is pretty high. Good quality. I'd say go for it, but the LED depends on the switches you choose, red- red led, blue - blue led, except brown, brown is white LED.

i am in australia, but you can try PM heavyarm.