It worked really well in warpath when we were starting to get rolled over, sam charged me and I fired a few rockets down the tunnel between points 2 and 3. It worked ok on defense in goldrush, just waited for the offensive ubers to die, then shot rockets at the cart.
Pyros. They shout and curse. Stabbing wildly. More brawlers than warriors. They make a wondrous mess of things. Brave amateurs.