Anyone ever use Brock 36"L x 24"W Interlocking Paver Base Panel? (or Paverbase)

It's supposed to be able to take the place of 4-5" of crushed stone when building a new patio. I have about 250sft and it would save me a ton of earth removal! It's about $13 through Lowes but it would save a ton of work. I'd be interested in how it worked for you.

Thanks for your feedback!