Hi, I know I'm way behind on this post but I've brewed in a bag for years and you can get the same results as all grain by having the right set up, for one thing you will not be able to sparge so add all the water at once which means you will need a 13 to 15 gallon pot at least for a 5 gallon batch, also you will need to drain the bag after 170 temp for at least 20 minutes so you need to have something to hold it with above the water level or you'll throw your back out, then if you put flame on the pot with the bag in you need a false bottom to keep the bag from melting, check the water after draining and add more if needed, I tend to go with 11.5 lb of grain and 9 gallons of water for my set up, hope this helps
