I wanted to add some new ones, but I'm hearing something about them being bugged, is this true?

Edit: If they ARE bugged, what bugs in particular are people referring to?

AFAIK new NPCs have a Face/Body skin tone mismatch. In CK their face looks fine but in game they are darker or lighter then the body.

Is that the only bug? I can live with that if it is.

the face/body issue is only bugged on esp's btw. it works fine on esm's