I update my H8 yesterday with 1.0.9 firmware and now I am using it. So far I can have the following comments:
1. I am a "simple" user, my H8 is connected into a full HD TV through the HDMI cable. Before I was getting the black screen issue in firmware 1.0.7, that means suddenly the image goes black for a few seconds, sound keep on, and image goes back and movie keep playing. Now with 1.0.9 this black screen problem reduced a lot, much better, but still have randomly.
2. I made a firmware upgrade using the reset buttom, all my installed apps were removed (Normal, I know that), but Kodi keep all the previous settings (I tough Kodi will also have a fresh start, but it was not the case, all settings I did before is kept with new firmware)
3. I have sound sync problem, I always need to advance the sound around 300 ms using Kodi in firmware 1.0.7. With firmware 1.0.9 I get the same behavior, nothing change, I still need to adjust sound +300 ms to get in sync with image. Because the audio delay is fixed I still can watch the movies properly, but need to make this adjustment for every movie I watch
4. Playability seems improved, all files I tried so far plays smoothly.
5. I also have a Q5 (dual core), playability is much better in H8 but picture quality is lower, the image is pale in H8
In overall I am happy with my H8, in my opinion the biggest blame for H8 is related with Rockchip chipset, Rockchip support seems awful and slow, I can say that because do not have any player with RK3368 chipset that is going very well, all of them have issues, Himedia is still my choice for Android boxes but surely rockchip is out of my wishlist forever.
Once I have more comments to do, I will update my post