I planed more wood in 1 day than I planed in the last year. That is because this cutterhead worked so great that I enjoyed planning, I put the boards in & walked to discharge end & waited for finish. Before it was a chore to plane boards. Bonus is that it is also considerably quieter. I wish I had done this years ago. I can't say anything about the durability cause I just bought it, The installation was a little challenging but doable. The Byrd website has pretty good instructions. The shaft on this cutterhead is slightly smaller than the original so L bought one locally & replaced it.
I wrapped the cutterhead in some thin heavy cardboard to avoid damage to head or me.
If your buying new planer, I would buy it with the spiral cutterhead no doubt.