Picked one up. Set it up as follows..
Micro coil at 1.4mm inner diameter, 10 wraps 0.32mm Kanthal at 0.9 ohms:
Test fire (photo appears dark since I had to adjust the camera to focus on the coil. Normal settings caused the image to be over-exposed making the area where the coil is a mass of glowing orange light):
Happy with how it glows from the center out, I trimmed the ends and inserted my cotton wick:
I usually set my coils at 0.9ohms with my mech and I find with the Immortalizer, the vape is a lot warmer than I am used to. It's not a bad thing (to me), it's just something new. It's warmer than my Nimbus and ERA for sure.
I find the draw to be right on even with the sleeves completely closed. I find airy draws give me gas so this one is perfect.
Throat hit is pretty good. It's pretty strong, but it isn't harsh. Vapor production is ok. I'm not too deep into sub-ohm territory and I'm only using a single coil. With the same build on my Nimbus, I find the Immortalizer produces denser clouds.
Flavor-wise, I find that it performs well on my minty juices. However, for whatever reason, I get a bland ceramic taste on my favorite Blueberry flavor. I've experimented with various coil heights (now sitting about 1mm over the air holes) and still getting the same results. Maybe the deck needs to be broken in. I'll keep vaping a few days on it to see how it goes.
Overall I am happy with this atty. I'd recommend this to anyone out for a good dripper.

It vapes well, and at least to me, it looks good too!
Now for some interesting tid-bits from Chief Vapers Pat...
The "water marks" on the aluminum sleeve is a protective coating to prevent the aluminum from corroding on some juice flavors.
The atomizer actually has an air-flow control feature built in. There are two ways to control the drag:
1. The height of the coil above the holes will affect the tightness of the drag and the flavor of the vape. More clearance between the coil and the deck will result to a looser drag but less flavor. Moving the coil closer will increase flavor but tighten the drag.
2. The outer sleeve and the top-cap can be adjusted to increase or decrease drag. Closing them both off completely will tighten the drag. To loosen the drag, unscrew the top cap then loosen the outer sleeve until there is about 1.5-2.5mm clearance from the bottom. Lock the outer sleeve in place by screwing on and tightening the top-cap.
There was a reason apparently for the reverse threaded outer sleeve.
Now as far as leaking goes, with the outer sleeve completely closed, I get none. The way I see it, excess juice drips into the holes and gets stuck between the outer and inner sleeve. When you take a drag, it gets sucked back up to the coil. Leaking starts when you loosen the outer sleeves. It may be an issue for some who want to get a looser drag, but for me it's a non-issue since I'm happy with how it feels with both sleeves closed.
Cheers!