I personally don't see what all the moaning is about, if you had played the games before you knew exactly what you were getting with them. Of course the controls are bad, of course the movement is blocky, of course the fire-fights are horrible, but what can you expect them to do? Remake the whole three games? Don't talk so wet.
Hitman is a fantastic series, and I personally didn't buy it to be wowed by the HD up-scaling or the graphics and audio improvements, no...I bought this to play the games I loved on PS2 on my PS3. Frankly I enjoyed these games more now than I did before, sure, the levels are hard as hell, but they aren't impossible. I've already completed Silent Assassin and am now halfway through Contracts. The game runs smoothly compared to some HD transfers (yes I'm looking at you Metal Gear Solid and Devil May Cry) but you must remember to save your game regularly, as I found out the hard way, that there is no auto-save function.
All in all it's an enjoyable retro game, for retro fans...if you think it looks too old and tacky and dated, good, it's supposed to, you want something up-to-date, by a new game. Bottom line is these games are called 'classics' for a reason.