Solid, spruced-up nostalgia that doesn't add anything else compelling.
Maverick Hunter X is the rebirth of the original Megaman X game for the SNES. It is a solid recreation, but it doesn't really transcend anything apart from the nostalgia factor.
The gameplay of any Megaman game is already a given at this point. Even when Megaman X first came out back then, it was still essentially running on the old Megaman template, but a bit spruced up. So the real question is:
How does it hold up today?
Maverick Hunter X keeps the full Megaman X experience intact, with the same blasting, dashing, shooting, and stage traversing antics. And that's fine, as that's what a remake is supposed to do. However there are a few things that mar the game. One of the things that tarnish the experience is the ability to switch subweapons while keeping the charge effect of a previous weapon (i.e. keep the Chameleon Sting Invincibility but still switch to Homing Torpedo). This might be a minor oversight by the programmers, but it definitely takes some edge off the difficulty of the game. The other experience-breaking alteration is the rearrangement of the upgrade capsules. That helmet upgrade isn't in the same place you remembered it to be, so you may need to reassess how you go about acquiring armor pieces. They've also altered the end-game stages, so veterans need to relearn how to tackle the road to Sigma.
Other than that, it has similar stage layouts, enemy placements, boss patterns, and acquirable items. Granted, it's all freshly programmed from scratch, so things won't feel the same. It's not emulation, people. Maybe you can say that it detracts from the game that they stuck TOO closely to the original, as nothing from the gameplay standpoint really jumps out as fresh and reinvigorating.
The option to play as Vile is definitely a welcome challenge to Megaman experts for its challenge and different play-style to X. Unfortunately, it does feel a bit tacked-on, as it recycles the normal X stages, just with some new enemy arrangements.
Maverick Hunter X also includes a watchable movie in the extras called "Day of Sigma", which explains the events leading to Sigma's rebellion. It's a neat little addition to the plot, but it's not anything significant. Some new cutscenes here and there spruce out the barely-there story as well.
The music has been remixed with mixed results. I prefer the new remixed Chill Penguin stage, but I still prefer the midi Armored Armadillo version. Apart from that, the sounds are solid, Megaman-fare sound effects. X and the cast have voice overs now, and it's average with some convincing spots. There are times when it sounds ham-fisted, but given the track record of terrible voice acting (i.e. Megaman 8 and Megaman X4) this is a good thing.
As a PSP game, the relatively quick, stage-based missions are fast and re playable. It's a good format for portable session gaming, but it still feels like a console game more than a dedicated game on the go.
Overall, Maverick Hunter X is a solid remake that doesn't do anything new that might reinvigorate the classic experience or compel new players to try it. It mostly serves as a nostalgia fan-service piece that manages to be enjoyable. And now, you can take it with you.