Got my EVO. I like the look and feel of carts, battery life. Don't like the taste or throat hit of carts ( using medium ), don't feel anything in throat, hardly taste anything, vapor is so so, but not as much as my pen style. I dripped couple drops of 555 in atty and much better hit, almost like the pen. Will probably refill cart with 555 and see how that goes. Awaiting 510 as well, have a feeling that one will be my choice e-cig.