In this HD POV video, I will walk you thru the major upgrades to the REO grand that make a 2015 model the most formidable, simple and versatile REO ever made. It has kept its small size and proportions but the under the hood upgrades aimed squarely at low ohm vapers, increased simplicity and beefed up, SS, adjustable and indestructible 510 connector make it a solid choice for Rebuildable atomizer users looking to run any size rda they like