This i an AMAZING game that I played years ago on the PS2. Everything about this game is rediculous. The combat, the story, the cutscenes, it's all over the top crazy action, and I love it. I bought this on Steam to try to replay it with some better graphics, but unfortunately, this game was not optimized for PC at ALL.
Controller support is awful, you CAN get some of them to work, but it isn't easy, and you have to a lot of research to find out how to get it to work.
Graphics are technically better than they were on the PS2, but widescreen support is not built in, so if you are one of the normal PC users that have a 16:9 or 16:10 screen, you will have blackbars on the sides of the screen. There is a mod to 'fix' this, but it basically just stretches the screen, so it looks awful.
Capcom didn't try very hard on the PC version of this game, which is unfortunate, because it's one of the best DMC's. Try Devil May Cry 4 or DMC, they have way better support, so they know how to do it right, just not wortgh their effort to fix this version I guess.
TL;DR version - Great game, but badly ported. Play the game, just not the PC version.