Doggy is growing on me and the second refill went smoothly.
I took the chance to make some quick comparisons to the Galaxies RDTA and YFTK Prime. The Doggy's chimney has a larger diameter than the chimney on both the Galaxies and Prime. The bell is larger on the Galaxies but the raised portion forms a second smaller bell directly above the coil. The Prime has a longer chimney. These differences may account for some of the differences in the way they vape. I had coils in all 3 so I didn't have a chance to measure the air flow openings under the coil but that is important and I look forward to comparing them later. The Galaxies has 2 additional air flow openings on the sides that can be adjusted for those who like more air flow. They can also be closed off so that theres only a single air flow opening under the coil.
The chimney on the Doggy appears to be plated whereas the Prime and Galaxies appear to be bare steel (plated versions of both are also available though). The deck on the Galaxies is gold plated. I prefer bare steel for several reasons. Some like plating. The glass on the YFTK-made Prime "feels" thin and cheap compared to the glass on the Galaxies. I assume the German-made Prime has better glass but I've never seen an authentic Prime. The tank on the Doggy is plastic. It does not have the same feeling of quality as glass. But for plastic, it seems good. Looks good to my eye also. The plastic tank and uninspired air flow control make it seem cheap but the deck section of the Doggy seems well constructed.
At $11, I don't think the Doggy is a crazy good deal compared to the Prime for $18. That's especially true if the plastic threading on the Doggy tank doesn't last. Seems like a lot of folks are buying multiples for this reason and that adds up. Of course, if you drop your glass tanks then they won't last either! Haha! There's a lot more to the Prime and YFTK did a super job with all the fine machining--All for only $7 more than the Doggy. On the other hand, the simplicity of the Doggy is something that some prefer. At full retail price of $30 for the Galaxies, the $11 Doggy seems like a good deal. But at the sale price of $16 shipped, you're getting a lot more with the Galaxies for only $5 more. I don't think you can go wrong with any of them. All 3 are capable of producing good flavor.
With all the crazy sales, the best deal changes every day. I've seen most of the MTL RTAs go on sale for around $15-16... like the Berserker, Berserker Mini, Galaxies, Gotank 2, Galaxies RDTA. I recently saw the Nautilus 2 for $8.50!