I enjoy Plum Pudding quite a bit. I've had it fresh within a few months of manufacturing, after a decade of aging, and in between. I think it's a very good blend.
I've tried the alternative versions as well, but prefer the main blend. It's certainly not my favorite English blend, but definitely in my top ten, if not my top five.
The first time I purchased it was on the recommendation from the local B&M as an alternative to Penzance. I ended up liking Plum Pudding more.
Just goes to illustrate the YMMV principle. Come to think of it, I hadn't had any for a few months... maybe I'll go crack open a tin.