So after a little bit of time with the 510N I have to say that it would be difficult to replace it as one of my go to pv's. The battery life is excellent, I have yet to drain a fully charged battery. The construction is very solid, with the different removable components it is a breeze to switch from 510 to 808. The steady power of it really wakes up the Echo carto's. Flavor and TH are great, every draw packs a Mike Tyson punch of both. I am looking forward to trying out some dual coil 510's on it. Now it does come with a notice that LR carto's and atomizers are not to be used on it, I would assume that there is some sort of protection circuit built in. I tried to use a dual coil Echo carto on it but it was a no go. Dispute that I don't feel I am really missing anything and it just gives me more reason to get a B-52 to try them out on because I would think they would perform similarly. Mr. Tony will have to weigh in on that one. All in all I would say it is well worth the money and comes with a great kit. It plus some Echo carto's make for a great all day match.