I voted "it's OK" since I liked it, but I found it to be much weaker compared to 3 and 4. I will say I think it's a better game than Metal Gear Solid, I had no fun with that game.
MGS 2 can be a bit of a slog, it had lots of interesting points, and I didn't hate Raiden. Possibly since I didn't play the first game when it came out I did not have the impression that Snake could never be replaced. The story from what I remember is pretty goofy, especially towards the end.
If you like MGS enough, just try to play it. Even if you end up hating the game, it won't ruin the whole series for you.
MGS 2 can be a bit of a slog, it had lots of interesting points, and I didn't hate Raiden. Possibly since I didn't play the first game when it came out I did not have the impression that Snake could never be replaced. The story from what I remember is pretty goofy, especially towards the end.
If you like MGS enough, just try to play it. Even if you end up hating the game, it won't ruin the whole series for you.