“Purchased the non XL evolve Plus with the yocan cerum attachment couldn't be happier! The XL version battery is a little larger and when you attach the serum ceramic coil atomizer has an overlap that isn't aesthetically pleasing at all. The Edge is actually kind of sharp and hooks on your pocket if you put it in jeans occasionally. Also after attaching the serum coil and then attempting to use the standard atomizer attachment that came with my unit I get the flashing light sequence and my battery will not connect.”