So, I've been using an Ego T for 3 months now, just regular old tips that I fill with smoke juice with a 510 atty and a 1000 mah battery. I was told today that I was behind the times, and was given an Ego C to try with my existing battery. Wow - I really dig this thing, I love filling my smoke juice into the cartridge and not having to top off as often, it has great throat hit and VP, and I'm really considering buying a kit, but I have read less than favorable things about it searching the forum - should I save my money ? Isn't this an upgrade ? I'd love to hear any advice from current or former owners about the Ego C before I make a purchase. Thanks for any feedback.