I got some CE3's in from TW a few days ago.
I have to say, I am actually impressed, I tried the GV Sapphire, but the 3 I got all had wicking and airflow issues resulting in dry burn and crappy taste.
These CE3's are a very similar design, so I was a bit worried they would suffer a similar fate for me.
Well I can say the first CE3 I opened up is wicking great, has excellent airflow, and the vape is great.
They are a bit more of a pain in the ... to fill, but I can actually chain vape these things like crazy and it doesn't dry up, or really even get that hot.
The only issue besides the difficult filling that I have seen so far, is that the little "catch cup" area under the drip tip seems to fill up pretty fast. I don't think its just condensation, I think there is small bits of juice coming up the airhole now and then and then sitting there in the cup.
I have to mop up the cup area twice per tank roughly, so that is kind of annoying.
If the GV Sapphire vaped as nice as the CE3, I think it would be the better product, its a little easier to fill (not by much though). Also the air tube in the sapphire is larger, so I think juice has a harder time making it all the way to the top like it can with the CE3.
I do like that the CE3's use a standard 510 sized tip, as opposed to the sapphires special tip.