I ordered some of the new 510 cartomizers from liquidxpress on Sunday and received them on Wednesday. I've never had any luck with the KR808 carto's... I've used them on the KR808 batteries and with an adapter on my other PV's, but have never been impressed. They've always been inconsistent in vapor production for me. I'd only get a couple of drags and would have to wait a while before I could get another good one, and I got juiced often. When I talked to Rob about the 510 carto's he said that they were KR carto's but redesigned to have better air flow and that the coil heats in the center, not at the bottom. I was skeptical, but he seemed quite happy with the redesign, so I figured I'd give it a try.
I put one on my Spade and gave it a try. I was quite impressed at first, but after a few minutes I became even more impressed. It produces great vapor, a pretty good TH, and has amazing flavor. Two hours later I was still impressed, but figured the juice would be running out soon, but it was time for bed. This morning, I put in a fresh battery and started vaping around 5:30am. About 10am it started to die down and I figured the juice was about used up, but then I realized my LED was getting dim also. Slapped in a new battery and kept on vaping. A little after 2pm I started to get a metallic taste - I had finally run out of juice. In total, that's about 10 hours of vaping on one cartomizer. Now, I wasn't vaping heavily, but I certainly didn't baby it. I put in a fresh battery this morning and vaped through two 360 mah 10440's today, plus two hours on a battery last night. And unlike my experience with the KR808, I didn't get juiced at all... Nope, not once.
No question about it. This cartomizer has far exceeded my expectations. All I was hoping for was something that would get me to and from work a few days (45 minute drive one way), but what I got was something much better. If I only use it while driving, then one cartomizer will last me a full week. Like the KR808, these can be refilled, but even if I only refill it once, then I'm looking at $1 a week to be able to vape heavily while driving. I will never fool with a cart mod again. No more fluval/PTD/ZMF/Blue foam... NEVER AGAIN! I've tried just about every cart stuffing I could figure out to try, but didn't have much luck with any of them. If I can't drip, I'll be using a 510 cartomizer.
As far as I know, these are only available at liquidxpress and Dietsmokes. They are prefilled with exclusive liquidxpress juice. I haven't heard if they'll be available unfilled yet.
Bottom line - I highly recommend these!