Has anyone tried them, my guess is their backend is a mess and good luck with unlocking domains and getting Auth codes, but I could be wrong. Sometimes the cheap price isn't worth the headache if you know what I mean.
I still pay much less than that. The catch is that's USD, so more like $10,86 CAD plus currency exchange fees - which is decent for a non-bulk negotiated price, but still a hassle and as USD/CAD fluctuates it may or may not be a great deal. And as @domains points out, who knows what their support or interface will be like.
While competition is welcome, I have yet to find anything better than what I already have.