You can only mow as fast as the deck and engine will allow! If your cutting a lot off then you'll have to slow down whether you have suspension or not.
But if regular cutting over rough ground, you can mow much faster.
I went from a Super Z non suspension (just the seat) to a new Super Z with flex forks and seat and well, its night and day!
Flex forks can cause a few problems though. For one, you need to slow down steadily before a turn or the front will dip. This can be counter acted by feathering the deck.
Mowing across slopes you can get more of a terraced look but I used to get that with the old machine so how much difference is really unknown.
If you drop a wheel into a whole you can get a bit more scalping than a regular fork. But you still get that scalp either way. Again, feather the deck!
I had my doubts about Flex forks originally but I have to say, I was wrong about them. Far less trouble than I thought they would be!
One other thing about the abuse, the suspension is between the frame and the ground so in fact, its better for the machine than not having them. Less jolting impacts on the front! Rear is another matter though for sure!
