I am in love with the B2K it's amazing little flavor RDA. Exceptional machining, a smooth airflow that doesn't whistle and a postless deck that doesn't require 10mm legs to reach the holes. Having small and large bore drip tips included are a plus, as well as the anti spit back insert for the large bore if you choose to use it.
The only minor issue I have with it is that the
juice well is small, and it's very easy to over squonk...
The two best single coil RDA's for me right now are the B2K and the Entheon, both superb and running perfectly in TC on my
dna squonkers. I haven't finished trying out builds on the B2K yet, going to put it on the Drone and check out a few bigger
coils.
The Wasp was a good RDA for the price, but I just couldn't get the thing to stop whistling. I don't have the desire or patience these days to tinker with RDAs that need tweaking and tuning to not whistle.