I have the H2 screen, it's not bad at all, but my preference is the E type which is like the standard screen but with etched vertical and horizontal lines to aid with architectural work but I find the etched lines helpful for anything.
The H2 screen should be the best screen for 24mm through to about 180 or 200 and is excellent in that you either have focus or you don't see in low light.
I just placed a 24mm lens on two F3's, one with the E and the other with the H2. Although my eyesight isn't too flash I was able to focus reasonably well with a light reading of 1 second at f/2.8 at 100 ASA.
Neither was easy for my eyes, but the H2 had the advantage that when it was in focus, I could see detail, slightly out of focus and I couldn't see detail. I was focusing on some white lace curtains in a darkened room which I thought would be the easiest thing handy to give me a possibility of focusing at that low light level. Not strict scientific practice, more seat of the pants type of stuff.
As to which is easier to use, not too much in it I would say, but marginally better with the H2 screen.
I use the H2 screen for action stuff with my 180 f/2.8 and it's certainly easier to focus accurately with that screen and lens than any of the other screens I have in combination with that lens. I picked it up just for that 180 f/2.8 about 10-12 years ago; wonderful combination.
Maybe you should start buying carrots in bulk
Mick.