I answered "No because BSM is stupid and I hate it and its stooped and I hate it.", but now that I've been reading through these comments, I have changed my mind.
The current sprinting in Minecraft is
very buggy. I especially hate when I sprint, but it moves the screen forward-and-back like I am sprinting, but I'm just walking. It has caused me to die quite a few times. It's also a bit annoying when I am chasing someone, I think I can hit them, I miss, and I have to re-sprint (I think that you keep sprinting in BSM, but I'm not sure.)
Pretty much, I support this if
everyone in Minecraft has it and it fixes a lot of glitches/bugs.
EDIT: So apparently this BSM thing allows you to sprint sideways and backwards. I really hope that isn't true. I mean, even folks on steroids would have a hard time running at full speed sideways/backwards.
Also, I hope that for sprinting, there are different methods of activating it. I actually like the double tap, so hopefully there's an option for that.
If you add a D after the B, it makes this thread a lot more interesting to read.