I'm really digging my 510 SB...
My 510 SB has absolutely the best draw I've ever had from a 510!! I love it!
The way Chad designed the threads with the vent holes is perfect!
I actually put away my other big boys and I sold my Prodigy and haven't vaped with anything else since getting my SBs.
My 801 SB is very good too, but 510 has always been my fave and now it's really really my fave!
The other thing that has me in seventh heaven is how easy it is to thread the two halves together. I don't have to struggle with it like with some other PVs that have a skinny end cap. The SB screws together nice and easy.