No doubt it's the best video player/codec pack available on www. I use it since 2007; started with older codec pack, different name but similar to this, then K-lite codec 2.88 then version 3... time passed and now voila, 10.3.5 :)
However, there are still some issues, hoping in the future it'll be even better:
1. I don't like those "lav codecs" default settings when installing. ffdshow is still way better generally speaking, regarding the quality of playback. Those guys working on lav codecs will have to prove first that they have the best stuff, and then it'll be okay to put those first
2. LAV splitter - yes, this is really good, Haali splitter had&still have lots of issues, especially on mpeg-2 playback. But: when the direct vobsub is active (subtitles), 25i fps videos have interlaced effects(the video becomes a bunch of horizontal lines, not watchable at all). With nero splitter - no problems at all. And yes, the de-interlace sett. I use is 'bob'-which plays real 25i fps. Is's a lav splitter issue. The reason I don't use nero is because of the interface. In lav is easier to change audio/subtitles streams. Hope they will get this fixed.
3. mpc-hc DXVA decoder - working fine, no problems on Win7. On XP, there's a horizontal black line (of maybe 20 pixles) on the very bottom of the screen. Not big issue though; at the same time I realize that most apps made today are tested on modern sistems: win7, 8... and less testing on sp3 xp.
Now, maybe some people will be telling me something like :"it's just you, you didn't adjust the correct video renderer, the x setting or the y setting". This may not be the case, it's been a while since I'm playing around with different playback settings & stuff, on both old & new computers ;)