I have had one issue after another since I began vaping last week. I started out with a cheap "510" wannabe from a smoke shop. While waiting for an eGo i purchased some cartos to go with it, they were too big. Had to call the company and after explaining to me I had a special "mini" they exchanged the cartos no problem. When I purchased my eGo, I also bought some Kamel cartos. I used to love Kamels. Got them, yuckity yuck, black licorice tasting to me. Also they were too low strength than what I ordered. contacted the vendor and they are being awesome about exchanging them with a different flavor... But in the meantime I placed another order thru a different vendor for some other prefilled cartos that sounded good. So excited to get them in the mail today, go to try one, and grrrrr, it's a female ended carto and I need male ends.I just want to cry because it seems like I will never find a carto that will fit. 