Looking for a wood heater for emergency/cost savings - Liberator?

I have looked at Mat Walker's stuff, and a You Tube video showed up about a new model Liberator stove. These two very different routes have some appeal to me. I came here because I think this is where experts might post. Is the liberator a good stove?

Permies member Chris McClellan ("Uncle Mud") seems to think so. He has reviewed the Liberator, which is essentially a rocket stove as is and can be connected to a home-built thermal mass battery to make a rocket mass heater. If you need a UL/EPA approved installation for your insurance company, it would definitely be a fairly painless way to go.
https://www.youtube.com/watch?v=R0RWyij5MlM
https://www.youtube.com/watch?v=19nIXijNYrA