I used to run A SuperSplitter all the time in the 80's when I worked for a landscaper. He was a dealer and rented the one we had out on occasion.
The S.S. will blow the doors off a hydraulic any day of the week as far as speed and production. It is fast, very fast., especially if you run it all the time and have the experience using it behind you. I would go as far to say it would even give a hydraulic with a 4way competition, it is that fast.
I did come across a few I had to repeat cycle through to get it through, and I have also gone through that with the hydraulic also.
It is very sippy on gas. As far as needing two ppl, you don't but sure two always makes things nicer. If I had the cash, I would buy one I like them myself that much. But I don't, so I bought my neighbor's hydraulic one.
I am happy with what I have and the price was right.
As far as the operator trying to keep up, that is absurd IMO. It only engages as fast as you pull the handle, so if you can't coordinate one hand with the other in what your doing, you have other problems, or simply this may not be the machine for you.
I have used the S.S., hydraulics, and electrics, and if I had the money, I would be all over the S.S.
That's just me, other have their own preferences.
As far the the redneck with the beat up one, I myself would make it right before I used it.
If you have used it and don't like it, that is cool, as everyone knows what works best for them, and different folks like different things.