Been through 3 or 4 tanks with the killer now and I give it two thumbs up.
I still haven't rebuilt it yet, but it really has brought life back into tanks for me.
I just thought to ohm it out and was surprised to find it at 1.9-2 ohms especially considering I have it on a Provari set at 3.8V.
Vaper production is great. thick fluffy clouds, not heavy, dense partial vapor like some RBA's. The flavor is all there. Filling is simple, just close off the feed before filling. Vapor is almost too warm for me at the setting I have it on, so adding a stem would cool it off nicely. And one of the best features is that the bulge in the middle prevents the tank from sliding off the carto and loosing all your juice in a big mess.
This is highly recommended for the jazz carto tank users.
Strike that- this is a MUST for jazz carto tank users