I finally relented and spent the extra money on a pack of green cig cartos from lecig.com I've looked at them many times in the last few months, but the price always held me back. I can be a tightwad at times.
I do have to admit, they were well worth the extra $$$. They look higher quality and even feel better in the mouth. Even the box they come in is classier. I've been alternating between 2 of them for over a month now, and they perform as well now as they did when I first took them out of the box. I've never cleaned them or even totally blown them out. I refill about 3 times per day. The juice that comes in them isn't bad either. The only drawback is, the plastic mouth piece doesn't appear to come out, so you have to fill them using the condom method. I tried that method before and didn't care for it because I had a tendency to overfill. I now have the system pretty much perfected and couldn't be happier. If you want the ultimate in cartos, give them a try. They are well worth it. I'll never go back to the cheaper ones. You do get what you pay for.