I received my Ego yesterday and have tried out a couple of flavors in the tank.  Here are my impressions:
I had never even seen an Ego up close (I am used to a Bartleby, a GLV2 mini, and a Vypr 510) and I REALLY love the size/quality/button/etc, but this is not a review.  I will say that it is an outstanding device, and the tank is as good as I had hoped.  What I wanted to know, and what many others will too, is how close it comes to dripping.  Well, it is pretty close.  DEFINITELY closer than any carto or cart I have ever seen.  I have been using only Ms T's juices.  The vapor production is outstanding.  Flavor is way up there. Throat hit is within the range of what I like.  There haven't been any wicking problems at all, and the juice seems to feed more smoothly than I expected.  I did have the opportunity to learn a few useful lessons.
Lesson 1: Energy Drink has a pretty strong flavor (comes out great in the Tank). HOWEVER, this flavor may stick in the cartridge or atomizer long after you have switched flavors!
Lesson 2: So of course I tried to remedy Lesson 1 by putting Red Hot Cinnamon Candy in the tank.  Not really the best two flavors together in my opinion.  The Energy Drink flavor stuck in the atty for about 1/2 the tank of Red Hot Cinnamon Candy.  It did strange things to the flavor.
Lesson 3: Once the flavor changed over the Red Hot Cinnamon Candy came through very nicely.  Excellent flavor, TH, and vapor.  I was impressed.  Much better than from a carto. Not as hot or strong as a LR carto, but still excellent.  But. It is another very strong flavor that will stick in an atty for awhile.  I only have one atty at the moment and I think they hold more liquid than standard atomizers.  Lesson learned, get more atomizers, and devote one to Red Hot Cinnamon Candy (worth it)!
Lesson 4: I keep a bottle of Unflavored around to run in between flavors I'm dripping sometimes if they are very different.  Sort of a palette cleanser I guess.  I ran a couple of tanks of it and it seemed to work through most of the Cinnamon flavor.  I put in a tank of a new melon flavor (that does not yet exist) and the flavor has stabilized.
Lesson 5: As soon as I am done with my last few cartos, I am done with them for good.  I will still drip for the most part I think since, in my mind, nothing compares to it.  The Ego Tank is most definitely going places with me for sure though.