Thoughts on the power expander?

Ran across this - Reprap.me Power Expander. Anyone used this before?

I have learned my lesson regarding SSR's, and have paid my penance in cash.

Luckily I haven't blown up any more power supplies. I have 2 mechanical relays on the way, but eventually want to switch over to a known good reputable MOSFET based solution.

Thoughts?

They work will handle 20A continuous and 60A peak They are effectively a good grade SSR without the packaging etc This is how a good SSR Should be designed.

Doug