In my experience it works fine with the wildfire, and everything included does what its supposed to do.
I'm not sure if it can hard brick a device as it only shows things relevant to the device you're using which should mostly have been tested before being uploaded but it certainly can cause a soft brick, I know this from experience on my s2, I rebooted into recovery through rom manager only to get stuck at the splash screen and then couldn't reboot into my rom. I didn't panic and wipe everything through Odin but sat down for 5 to think of possible reasons why it could have happened then it dawned on me that on an s2, clockwork mod recovery is built into the custom kernel because we don't have a separate recovery partition so the flashing of a temp cwm from from manager could have wiped the kernel partition. That was my theory and I was correct after flashing the kernel again all was fine.
The wildfire has a recovery partition so cwm is installed permanently on its own partition independent of everything else so this soft brick problem some of us suffer from shouldn't affect you. If anything else goes wrong, say flashing a broken rom I'd say that's partly the roms fault for being broken but mostly your own fault for not researching exactly what it was you're flashing beforehand.
Anyways everything works fine for wildfire so don't worry........
Samsung Galaxy S2
Asus Nexus 7
Samsung Galaxy Tab 7
Samsung Galaxy Note N7000
2 x Samsung Galaxy Ace 5380i's