It just needs some improvements
SNK also brought back a few characters that went missing from the series. Duck King is one of them making a return. Sadly the character roster isn't as interesting as KOF 2000, 2001, and 2002. Billy Kane is missing, and some of the characters you can unlock aren't as fun to play with except for EX Kyo.
Also SNK dropped the ability to bring four characters into a match so instead your reduced to three.
You can also unlock a few extra characters, but like I said before. They're not any good. There are 14 new endings but there not easy to unlock.
Some of the stages are nicely done, but they're not that interesting except for Esaka 1 and 2, Plus Duck Kings Alley stage brings back memories of the Fatal Fury days. But what about the music? Honestly the music is awful, of course the team with the most tolerable music would have to be the Anti kyokugenryu. The Psycho Soldier team theme music is okay except for Athena's stage. I hate J-pop music, so every time I had to fight Athena on her stage I just shut off the sound to my TV.
To sum it all up KOFXI is a decent fighter to say the least. SNK just needs to do something about the graphics and the music. Capcom VS SNK 2 was the only game featuring SNK characters that were capable of competing with Street Fighters 2D graphics.
People have also said that the final Boss in KOFXI was difficult, but the best way to make him easy to beat is to Set your defense to 8, lower CPU defense and set your SP gauge to MAX and CPU to Normal. lol this will make Magaki an easy boss. A
I would recommend getting this one whether or your a fan or not. Before it becomes rare someday like all the others.