Both games are unique and fun, and they are given a slight boost in graphical quality. But for the most part still very much resemble PS2 games. Certainly worth a rental, unless your only interested in games where you run around and shoot things, if that's the case then you should instead pick one of the hundreds of cookie cutter shooter that are available.
ICO and Shadow of the Colossus were PS2 titles that weren't as popular at the time. But built itself a strong fan-base from those who had played their original release. To anyone thinking about picking up this title, I have one thing to say. Just Get it, you won't regret playing these amazing games. No other game can compare to these two games. Once you've played it you'll become a fan of the game. It's unique gameplay, Powerful story, Gives you a sense of accomplishment just completing this game once. Even though it is a previous generation title, this collection is without a doubt ahead of it's time. You won't be disappointed in playing this collection. One of the rare games that is well worth the time and effort to play.
ICO is like playing a classic fairy tale. It is an adorable and emotional story that can bring you back to your childhood in ways. It is a puzzle game at heart, and it can really test your brain, so have a guide handy if you are so inclined. And keep in mind that it is a 10 year old game, and although it visually is still beautiful, some of the control may get finicky, but the animation is surprisingly good! ( P.S. play this one before Shadow! )
Shadow of the Colossus is an emotionally epic experience. You will scratch your head at some cinematics but will soon be sucked in to the style of the story. No music plays when journeying to 'thy next foe', and that was a brilliant narrative choice, keeping you attatched to your horse Aggro and the Forbidden Land. The Collosus battles are indescribably fun and each is unique. The later beasts get more puzzle-like and can get very creative with how you must take them down, and the battle soundtrack is incredibly heart-pumping.
These are 2 classics that must be experienced by every gamer, and are beautiful examples of game design and interactive narrative.