The Puffin is a great entry level phono stage that does a lot of cool things and has more than enough gain to drive any cartridge.
I wouldn't go so far as to call it a "wonder" product, but I can't think of anything at its price point that would be better. Better / more expensive phono stages will have more dynamics and detail than the Puffin is capable of.
From what I've read, it sounds like the Waxwing is an evolution of the Puffin and provides the ability to make adjustments through an app.