So we did a BIAB with this bag this weekend, and I have to say it worked great. I love that I can now mash the full volume in my MT/BK. The finer mesh does indeed keep more draff out of the boil, and I'd say there's a minor reduction in flour as well, but nothing huge. The bag is definitely sturdier than the paint strainers, and the drawstring is a big big plus. I find the elastic on the paint strainers wears out after a few uses on the paint strainers and I have to buy a new one. That won't happen with this bag. This bag is also easier to clean- the tighter mesh means that any grain that sticks to the bag rinses right off like a sheet of plastic. Overall, a great bag and I'll recommend it to anyone.
A few things to note, cons of the bigger bag- because the bag is so much larger than the diameter of my pot (I have a tall and skinny 7.5 gallon pot), there is some bunching which can make stirring and squeezing tricky if you don't take the time to carefully arrange the bag before you dough in. I didn't do this and definitely will next time and don't think it will be an issue. Also, I occasionally direct-fire my BIAB for a step mash or some other reason just by heating up the BK and holding the bag slightly off the bottom. This works fine for me, but all the extra material and hanging strings makes this a more complicated proposition.
A few things to note, cons of the bigger bag- because the bag is so much larger than the diameter of my pot (I have a tall and skinny 7.5 gallon pot), there is some bunching which can make stirring and squeezing tricky if you don't take the time to carefully arrange the bag before you dough in. I didn't do this and definitely will next time and don't think it will be an issue. Also, I occasionally direct-fire my BIAB for a step mash or some other reason just by heating up the BK and holding the bag slightly off the bottom. This works fine for me, but all the extra material and hanging strings makes this a more complicated proposition.