That appears to be a rebranding of the indulgence v3 that I've seen at eastmall among other vendors. Although this is the only place I've seen offer it as a body only at $40 everyone else has them as a kit only at around $60. I've been trying to find reviews of the indulgence v3 but every one that I can find is referring to the V2 which appears to be completely different. I'm yet to find a review of the v3 but an all mechanical mod for $40 I'm tempted to try it blind.
Here's some info I found on the Indulgence V3 as to the written up by Dexter at Vapor Junction as to the improvements from the V2.
"They have improved the unit in ways such as an upgrade from aluminum to stainless, improved threading, and using ONLY the 510 adapter cap and adding low profile 510 adapters instead of multiple crappy adapter caps. We will continue to sell the Indulgence once these upgrades / improvements have been made and in our opinion is a better option for the 18650".
Not many people carrying them yet but since the link above has them in...although rebranded, it shouldn't be to much longer. Looks like a nice step forward for that mod.