I just got mine today, vaping with it now. Seems to be fine, I like it. Using it on an MVP 2.0 (also received today). Draw is light, decent vapor production, although I'm not looking for clouds of it. Just enough so that I know I'm getting it. E-juice is an 80/20 pg/vg mix, just menthol. Tastes pretty good through the T-Dux 2.0. MadVapes posted a bit on it in their forum, seems like there are two heads available the ceramic and one with paper in it (??) Apparently the ceramic head leaks a bit with thin juices, the other does not but has it's own drawbacks. Here's a link to the thread so you can figure out what I'm trying to say
Edit: Mine measures 2.0ohms on the mvp2, vaping at 7.5 watts. It has 2 air holes in the base part that screws onto the ego threads. Lines are very sleek, looks to be well made, very smooth.
http://www.e-cigarette-forum.com/forum/madvapes/521069-madvapes-wants-your-feedback.html
All in all, I like it. No leaks so far but I've had clearos before that didn't leak and then started to later. Anyway, the above is my first impression. I only bought one to try it out so I'll use it for a while and see if I still like it. If it continues to perform as it is now it'll become my main clearo for ego threaded devices. If they made one half the size I'd really be happy! (it's about the same height as a PT2 mini.)
Sorry, can't comment on rebuildability as that is a topic I'm not familiar with. Will be soon though!
Kind Regards,
Blackie