I'm moving up from my pen style pv to something better. I was thinking about the Kgo. Any advice ? I want either the Kgo or Riva. Is there really any difference ? I like the idea of the on and off capability as of yesterday when I accidentally burned my thigh. I want a pv that is not too big but not pen style. I want something that produces a lot of flavor & vapor with a decent but not too harsh throat hit. I also know that nic levels go into the throat hit so I've been experimenting with different levels to find out what I like best. Also I read that the cartos that come with the Kgo are crap so can you recommend which ones to get ? I also don't care how fast the juice burns up as long as it tastes good and I do vape all day and I would like to not have to refill every 45 minutes or so. I know I'm asking a lot of questions but I've only been vaping for about a month. I also have to say that you guys have been great as far as advice and you guys are just so freaking nice. It's refreshing to see that and thanks again.