While the attribute (+2 dex, +2 int, -2 cha), the bonus feat and skill points all work correctly I do not get any elemental damage resistance for acid and fire or darkness 1/day. This may be a bug or you guys may have removed these because they make tiefling too strong or something I dunno.
The darkness 1/day item needs to be spawned by a DM. Not sure about the elemental resistance.
My appologies, it seems to be fine. I forgot they gain no resistance vs acid!