Having played the first three games on Xbox back in the day these games are very well known to me, the stories are brilliant, the levels varied offering multiple paths to complete missions and the gameplay really cool. Now the graphics are displayed in HD and look much better for it, but don't expect current gen quality in textures.
This is the first game I've bought for PS3, and it is a great machine, but after the long update I put the first game on and am experiencing some odd sound problems in that the characters in the first game repeat the last word as the game loads up the next bit of dialogue. It's really odd and only on in-game dialogue, the cutscenes play fine - though oddly not in HD.
I've only found the problem on the first game, but I've not got far enough in to know the other two are fine or not.
In Chaos Theory, the framerate suffers when loading it up, but this is fine afterwards, there is also the absence of Co-op from that game, which is really disappointing as it was great.
Summary - it has problems and is missing a great feature, but at £15 for three amazing stealth games who can argue?