I've tried a few other ezine distribution systems...I find that your product is way cool!
I've been trying to find a provider like yours for months. Something I can afford and get support during the evening and night time hours when I do most of my web work. Benchmark is too expensive and they go home at 3:00pm my time with no support available.
I have found Ezine Director to be one of those tools that increases productivity a lot.