If you've never played a Megaman game, there is no better place to start then here!
The gameplay is both solid and addicting as hell. Following the RPG staple, battles are random and numerous, but the expense of different enemies makes each battle unique. Another aspect is the huge amount of customization in the game itself. Battles are fought using over 200 different weapons known as Battle Chips, adding both a collecting aspect and allowing the player to fight as only they can fight. If that weren't enough, depending on your battle style, the player may undergoe a transformation known as a Style change, allowing them to fight at the peak of their fighting style.
The bosses of this game are amazingly detailed, as well as possessing just the right amount of difficulty. The bosses aren't too easy, but only a few will make you want to rage out of frustration. Even after numerous playthoughs, even the best of players may still have trouble with one or more bosses.
Finally, even after you beat the final boss, you are only maybe halfway done. A whole other sidequest is unlocked, adding on maybe 10-20 more hours of gameplay to this game. If you haven't played this game yet, then you're severly missing out!