They're a bit more flexible and a lot more arm friendly than a prostaff. I've got one leaded up to 14oz with a gut/poly hyrbid. The other one I've left in stock weight with orginal strings (its in inferior condition with previous owner sanding down the bevelles to make it 4 3/8. They did a lam job....).
If you have one, get it
They perform quite well in good condition.