I absolutely love the KR8. I have been smoke free for about a month with little to no cravings (pretty surprised myself). So obviously this PV setup has been working for me. Recently I noticed the very good deals on the Ego type PVs and was wondering if any other KR8 users have familiarity with both types. I plan on keeping a supply of KR8 stuff because my wife likes it and I like it for those times when I want to be a little less noticeable. I plan on getting an adapter to be able to use the KR8 cartos I will have. So what is the experience others have had with this type of combination coming from KR8 exclusively? I know I could get a Defender model that is threaded for the 808 cartos but the price difference is fairly significant and as many other posts have stated there is little if any voltage difference anyway. I am starting to think I may be better off just making sure I have enough back-up batteries and cartos/juice for the 808 rather than going down the road of a different model. I really appreciate any and all input before I pull the trigger and spend more money.