Great review! I have to admit I picked these up for a good "tank" type system on my Darwin, as I'm not a big fan of normal polyfill cartos. I was pleasantly surprised with their performance, and even though they are in the 2.4-2.6 (or 2.6-2.8) range, they actually work perfectly at about 3.7 volts, so they work really well on standard 3.7 batteries in addition to VV/VW devices. Also, since they're not low resistance, I get really great battery life when using them because they don't pull a lot of current out of the battery - so even using a 10440 based mod, I get a pretty decent run time before having to swap batteries. I've never had much luck with the "CE" series prior to this. I vaped 2 different CE3's non stop over the course of 2 days. Unfortunately, after the second day, I developed the nastiest case of sore throat I've had since I can remember. Have you had any similar issues with them being rough on your throat? It is possible that the sore throat came from something else, but I'm wondering if these just don't agree with me. It's a real shame because I LOVE these on my darwin for the convenience. I'll probably give them another try once my throat stops hurting (it's the end of day 2 since I stopped using them, and my throat is still hurting pretty bad).