Yeah, i agree with you about the "old Fashioned cartridge". My wife went into the store and bought this. It's and Ego-T, but i think the store must have changed the cartridge part out. Every video on youtube for the Ego-T has the tank and ours doesn't. Not sure if the girl ripped us off or just did not know what she was doing.
You might not have been ripped off -- eGo-T is also a style of battery. I got eGo-T batteries with my eGo-C because I wanted the passthru feature (they didn't offer it on the eGo-C at the time) which allows you to use it while it charges.
Personally, I like the eGo-C tank system. If that is what you're after, I would recommend it over the eGo-T, because it's cheaper to replace the atomizers because you don't have to throw out the whole assembly. I use an eGo-C with juices I don't want to vape all day long, and I have Vision Clearomizers that I use for juices that I do want to vape all day long. I simply don't want to vape 1.6 mL of the same juice in one sitting very often, nor do I like going through the hassle of cleaning the Visions regularly. I have a few Visions for juices that I only want a couple of puffs of now and then and I just keep them loaded. This combination works very well for me and I've had a generally enjoyable and trouble-free experience using both set-ups in tandem. I would suggest that you try out several lower-priced options that look appealing to you. Everybody (including myself) thinks that what they use is the best, and it's good to get opinions on different equipment, juices, etc., but ultimately use will determine what you like best. Your use preferences will come out in time, and there's no one option that works for everyone.