I prefer the VZ ones (well the new batch at least) for the fact they last longer than overnight. Seemed the old ones would be good for a few hours then while I was asleep the cartomizer gremlins would come out and take a steaming hot sour demon crap in them. I'm sure a lot of people check for this in the morning but I wasn't aware that they were real and would be greeted with a mouthful of wet taco style fart flavored gremlin fecal matter in my mouth. Anyways, I digress...
I actually came here just now to ask if anyone is familiar with a Kgo friendly button protector on the market? I seem to recal seeing something like that months ago but can't remember where?

I still have quite a few of the originals from MadVapes. I haven't tried any of the newer ones from MadVapes with so many reported problems. I tried the previous batches from VapingZone, and those were overall good except that they wouldn't screw all the way on. I understand that current batches shipping from VapingZone have this problem and other reported problems solved. I've got 5 EMDCCs from smoktek that I'm currently testing. Overall, I'd have to say that I can't tell any difference between the smoktek and the original EMDCCs from MadVapes and that includes overall outstanding performance. I don't have the tools or equipment to tell for sure, but I think that the EMDCCs from smoktek are identical to the original EMDCCs from MadVapes. For now, I don't plan to purchase any more just for testing, so my next purchase will be close to when I run out of cartos. I'll keep reading reviews, but my next purchase will probably be from SmokTek.
eGo Mega Dual Coil Cartomizer Round Tip
eGo Mega Dual Coil 4 ML Cartomizer LR 1.5 Ohm, 5 Pack - E Cig : Joye eGo & eGo-T | Boge Leo | Cartomizers | E-Liquid | Electronic Cigarette | eGo Tank
510 Ego Mega Dual Coil Cartomizer - 1.6 ohm, 4.5ml, - Black w/tip