Plays exactly like Dynasty Warriors series and Samurai Warriors. If you like the other games then you'll probably like this too. I don't mind the hack and slash games, but I only played Dynasty Warriors 4 and 5 on the PS2 and Samurai Warriors. I would recommend this to those that like the other series just because well it's a little new. It plays the same and all, but with the added Gundam theme. It's basically just like going from Dynasty Warriors to Samurai Warriors. Story isn't really that great though, but if you just wanna destroy 1000 enemies then this is it. I have only watched G Gundam and Gundam Wings, so I'm not sure how the other series was. But characters comes from all over the series, but only Domon from G Gundam and Heero from Gundam Wing is in here. Cuz I don't really recognize any of the other Gundams.
The game to me is shorter then the other series because well, there's really no more then 4 missions for each character. And it basically just drag each mission on to about 15 - 30 min. So basically to level your pilots (max 30) or Gundam (max 10) you would have to play the mission over and over. That's probably why they give the option to play with a pilot using different Gundam. Along with the cutscene and victories, they seem to be all the same no matter what Pilot you use. But there is a "Offical Mode" which follows the Gundam storyline, and it will end the same, with the same cut scenes no matter what side you pick....... The "Original Mode" Which is a story about a mysterious planet and all Gundam pilots are just thrown in there.
If you like the series, but don't like the Gundam theme then I suggest you just wait for Dynasty Warriors 6.