I own a KJW KP05, my first KJW product, Im very impressed with the quality considering the price.
Its very solid and the internals seem very well built compared to my KSC Glocks. The outerbarrel comes loose after 5 or 10 shots, so you need to locktight it to the faux chamber.
There are no trades on it if that matters to you, only 'KJWORKS MADE IN TAIWAN' in a very small type above the trigger area on the frame.
I say go for it.