I love the Moonshot. That said, skip it. It is damn fiddly to build compared to some similarly performing tanks such as the Coil Art Mage and slightly tighter Innokin Axiom. I have not tried the Petri RTA, so cannot compare.
I have also not tried the Azeroth, but hear good things. Comparable to the Azeroth is the Ijoy Combo, Geekvape Avocado 24 (not so much the 22) and Limitless RDTAs... all of which I do own and use.
There are some that will disagree, but it's really a matter of semantics... an RTA is a tank (duh) but the coil is housed and inaccessible while vaping. An RDTA has a tank, but the coil can remain accessible. The other definition just refers to the type of deck and juice flow to the deck. With that definition, the Aromamizer and Bores are also RDTAs... which I also own and use.
Now, honestly, for ease of use, no leaks, great flavor, and decent clouds, skip all of these and get the Engine RTA from OBS.
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