I know this is LATE but in case you are still interested, I currently have their kinky straight hair in now and i LOVE it!!!! I'm thinking of purchasing more hair from them.
Its kinda poofy, so you'll only need one pack. My head is pretty big and i still had 1 track left. I matches my Hair 100% no one can tell, not even my weave-hating boyfriend. When i told him, he finally admitted it looked really good.
I have to flat iron on 410 to get it to lay straight. It looks beautiful.