I found the BB's take a while to warm up to, but once you find a good vape out of them it's near impossible to go back to anything else. For me, the MF bridge is perfect. The MTL ceramic coils provide THE best stock coil MTL experience I've ever had, and the DTL coils are stellar too.
I've vaped nothing else for 2 months, purely in MTL mode. CBA with rebuildables but who cares when the stock coil experience is this good.
They're easy to use, have great liquid capacity, the DNA60 board provides excellent battery life, they're well built, they're pocketable and portable, they look good, they're customizable and the SXK versions are very price efficient. It's the one piece of gear I've used consecutively for months on end and have zero desire to find anything else.
In the long run, they've saved (and will continue to save) me a fortune too. The ceramic coils last forever and the BB has been the one piece of gear to cure my shinyitus for anything else.