Again, it's a longggg story, but I had a prominent local Ford racer and engine builder do my 351C. We've been friends for more than twenty years, and he built it for less than I could have.
We did several mods including mildly-ported 2V heads and Keith Black pistons. He had several Erson cams on the shelf, and although I don't remember the grind, on a scale of one-to-five (five being the most radical), I selected a four. We were looking at about 10.25:1 compression.
Bottom line is I never got the performance I/we expected, and part of the problem is that I don't think he used the cam I asked for.
It dyno-tested at 200 rear wheel HP, and a drip test (I think that's what it's called) showed the compression to be just over 9:1.
Don't get the wrong impression...the compression isn't the fault of the cam, and although the performance is not what I wanted, it still goes pretty good.
It's been a couple years, and in another year or so, I'll be ready to tear into it again. This time I plan to do it myself.
So my answer is that I'm pleased with Erson in general, and they DO make cams that pretty much cover the full spectrum. I just don't think I got the one I wanted.