I can't see the point of an FTSS for my setup where I'm really only fermenting maybe 2 batches at once on the odd occasion.
I can see the point where somebody was fermenting multiple batches at a time consistently. You just have a freezer or fridge cooling a big source of water for your fermentors instead of a bunch of fridges (or cold room).
Automatically switching from heating to cooling would be an issue in Brisbane I suppose. Probably end up replacing their control unit with STC 1000 and run pumps from cold fridge or hot urn. Or you purchase 2 FTSS's.
EDIT: I should say it reduces the volume problem. My system needs about 22L to fill malt pipe and cover heating element. This mesh pipe would need probably 1/4 that, so you could do reduced batch sizes for experimental brews or quicker school night brews. Hmm, not a bad idea: reduced height malt pipe for school night brewing. Do half the recipe each night, cube them, and then full ferment..