Bermuda has a hard time handling MCPA and triclopyr, which is what replaces the 2,4-D present in Speedzone. I have done Cool Power on bermuda, problem is that the weeds tolerate more herbicide than the grass does. It is probably ok on totally dormant turf.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738