I have the Roku Ultra (4660RW) Vudu Edition with Netflix, Hulu, Sling TV & Vudu dedicated buttons. What generation Vudu Ultra is mine. I bought it about a year ago. So I assume it's the 1st Gen model, but Vudu Edition. Wish an update would come through to allow me to change them or at least allow me to program the A & B gaming buttons. I mean, I figure they're the same as the 1 & 2 buttons on the new Roku Ultra model. Which I assume is the 2nd Gen model.