I just installed a set of Gator Mulcher blades made by Oregon, I purchased from Baileysonline.com on my Cub 1450, 44" cut. There are 6 different versions of Gator Blades. I purchased the 3-in-1.
The jury is still out. I use this mighty mower to cut pasture grass not the lawn. The new blades do cut pretty good. Whether they truly mulch the cuttings into fine pieces or not, is difficult at best to determine as I cut every other week so the growth is quite tall. Having sais that, for my purpose they do appear to hold an edge longer then the standard cub blades. Keep in mind, pasture grass is a bit tougher then my 3/4 acre weed free lawn (which I cut with a Cub 33" walk behind - great exercise).
The cost from Baileys is about the same as standard set of OE blades. For the couple of bucks more, it's worth the price of admission.
My opinion for what it's worth................