The more I play HotS the more I realized that I never tried Swarm Hosts as Zerg. I've seen matches from Catz where he massed Swarm Hosts against a Terran who plays Mech and it looks like it seems to be a pretty damn good unit to use. My only problem is that I never get to micro properly. I understand that these units are really expensive and such. Sometimes I absent mindedly just let the Swarm Hosts go to one spot though they just get pulverized by the opponents army. Still, I really want to find a way to incorporate Swarm Hosts to my army against all three matchup. I sure could appreciate any advice you can give me.

Here's a replay of the last match as a basis:
http://drop.sc/301513

Thanks again.