My experience with Ribteks only includes whitetails and one sika deer. Oh, and one concrete wall by mistake. One darn good broadhead if you ask me. Other solid heads I've killed deer with include Grizzly, Zwickey, Snuffer, Woodsman, Bear, Ace, and probably one or two more I can't think of right now.
I've had zero issues with Ribteks (including the concrete wall) and prefer them over all the others I've used. Ace would be my second choice.
I think people used to shy away from them because of the ribs and the fact that they were inexpensive. I decided to try them before passing judgement and have been well pleased.