hi..i got titan, serial#229
i like it becoz of the looks. not too shiny, rustic look (i have the sandblasted edition) and claims 0 voltage drop. lock mechanism on the fire button really good and innovative. can take in virtually any size batt 350, 850, 500, 470 etc..its a telescopic mod.
the only gripe is that there are lots of threading inside the body so from time to time it might get a bit squeeky. but easy fix with some lubricants

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then the locking mechanism, if it is unlock (and if locked to a certain degree), there are openings on both side where small debris might get in especially if you put it in your pocket. once my firing button kinda stuck, not smooth so open it up (1mm allen key) and some cotton pieces was caught between the button and the body. another easy fix.
then the body itself, a lot of vertical oines/ridges so dirt/debris etc. can lodge itself in, still an easy fix, just use small toothbrush to clear it away.
paired it with aga t+, smok rda, fatty..works nicely. although some smaller clearomizer will not work especially those that have sleeves for ego type connector. other than that i'm a happy vaper