I've been using my R (s), dubbed the "SQump", with my B deck exclusively since I got it and it is fantastic. Vaping with this set up using kanthal has been an absolute joy, a denser and juicier vape that's a little better on flavor, and my coils can go a few extra days before rewicking is needed, which was an unexpected surprise.
I never got leaking or gurgling out of my W deck using the SQR but I would occasionally get dry hits when chain vaping, the B deck solved all of that - and still no leaking. I agree with chia, the B deck works like an auto-dripper. Though that added juice flow combined with the reduced tank capacity means my SQump can't get me through an entire day and night, but its a trade off I'm happy to make for the superior vape and sleeker profile.
Once my DNA40 gets back from RMA I'll start using the SQR to experiment with TC which has been kicking my .....