I got the PS3 version to get into the series (never played any of them), damn I'm amazed at how well the visuals hold up by today's standards. The textures arent as detailed as today's games, but everything is sharp and looks really good, runs smoother than many games today. The controls are complex but I'm beginning to get them, and as for the game itself I'm starting to really enjoy it (started with 2, then will play 3 and peace walker last), it has so much polish.
The graphics were my biggest fear about HD collections, but this has completely changed with metal gear (this is coming from someone who hasn't touched a ps2 game since before the ps3) and I will probable take the plunge on more HD collections in the future, so recommend me some lol.
Edit: I feel stupid now, I have just done the Fatman boss fight, about five hours in and have only just learned how to manually save using the codec screen lol, Until now I thought I had to rely on times it came up automatically, hence a 3 hour stint earlier waiting for a save point :/