These days I tested Himedia q10 on my Sony KDL-65w855a as well as on the Panasonic TX-P65VT65, Marantz SR7008 AV Receiver. I play only ISO, bluray REMUX and MKV (DTS-HD and TrueHD) movies (Grym, Sparks, PublicHD torrent files). Problems:
1) Freezing videos. In almost every movie the image is frozen once (it happens at random) and it takes about 30 seconds, after that movie is going normally.
2) Every couple of seconds to a minute audio and video stutter that exist on any video file that you start (this is quite disturbing and shocking). Only after the reset, the problem disappears and re-appears after some time (a few hours). When this starts to happen, it happens in every video file.
This is a great shame for the Q10, which is valid for the best device of its kind and it is useless for serious cinema experience. Big disappointment.

Additional observation:
Default built-in media players on my TVs play smoother movies than Himedia player. On it, there is a slight microstutter on any video file (but it already finesse and barely noticeable).
TVs are calibrated so that Himedia Imprex only violates the calibrated image.
3D I have not tested.
All tested on the following settings: 24p ON, HDMI Output: RAW, HBR Output: RAW 7.1 and 2 TB internal NTFS drive. (Tested and with another external drive with identical problems) Firmware 3.0.1.1