After bringing this "home" to try on my mac, I was very disappointed. Right at the start it states that it plays matroska and has a better method of displaying subtitles. Funny, "out of the box" it couldn't play ANY matroska file. It kept trying to send me to web pages (and without an internet connection on that mac, that's not possible) for plug-ins. If it has to search for a plug-in to even play a matroska file, that it CANNOT play a matroska file and should not state that it can. It should say, "after hunting for dozens of plug-ins it might be able to play matroska files."
Even playing basic quicktime supported stuff it had problems, like continuously showing the beachball and preventing any interaction. Found out this was due to it's literally unending attempts to phone-home for something (again no internet connection, and even so, it shouldn't be trying to infinitely call home for anything -- is this installed spyware or improperly implemented logging/registration and update checks?).
Even after finding and loading a couple EXTRA codecs (including Perian a known conflict problem generator) it still couldn't play matroska. Of the five files I provided, the audio in all was choppy, the best video I got played only 1 single frame on average every 20 seconds. And the subtitles are worse than VLCs by all regards, they were soft and transparent, very difficult to read even on a still image.
VLC works better and faster, and though I couldn't actually get Chroma to crash (like VLC does), locking itself from interaction with a 1-2 minute beachball display is actually worse than a crash, which can be recovered with an instant re-launch.
The ONLY reason I would ever use this is if they can actually write an efficient matroska code set for it, so that I can actually watch matroska files (needed for many newer fansubs). Otherwise I'll stay with VLC, which, while not able to efficiently work with matroska, actually works faster than this. Heck for basic Xvid, VLC works without skipping frames while my computer is doing many other things concurrently, like video compression, downloading, burning DVDs, AND compiling code. Chroma couldn't even play the matroska files, when that was it's ONLY ltask.
(QT Player, I gave up on 2 system updates back, when opening many videos took up to 5-10 minutes, they played fine after, but taking that long to open, somebody at Apple should have been fired.)