Got my Benjie K9 yesterday. I was impressed even before I opened the box.
It's a compact, glossy white box that doesn't feel at all cheap and has a bit of heft to it.
Inside is the K9, a small instruction booklet, the USB charging cable and a free pair of earbuds.
The body is made of metal, feels great in the hand and solid. The buttons have a nice tactile feedback and work well without any input lag. The UI is a little awkward at first but I got used to it in no time. The screen is clear and bright enough to use outdoors but it can be a little difficult to read in direct sunlight.
Sound is good although I haven't had time to A/B it with my Xduoo X2 yet and also haven't had time to test the battery life. So far I really like it and there's a good chance it will replace the X2 as my daily driver.
My only concern at this point is that the plastic covering the screen is a little thin but apart from that it all seems great. Considering it only cost $24 it's an absolute bargain.