Gromm said:
Every party I know of invests in one of them. Being able to carry 250 lbs of stuff is invaluable.
The problem with Bags of Holding is that a lot of DMs do not run them properly (or maybe I should say realistically).
A Bag of Holding is about 2 feet by 4 feet in size. That means that if a human or elf has it strapped onto them, it goes from their shoulders down to their calves. No room for a backpack as well. If a Dwarf is carrying it, it goes from the top of his head to his ankles. Halflings should find them very difficult to carry, not because of weight alone, but because of mass.
There are very bulky.
Plus, a Bag of Holding is very fragile. A single sword thrust from the outside will ruin it.
So, you have this large bulky object which should be very recognizable (at least for some foes adventurers run into), which is very fragile, and which should be really easy to hit in combat.
In fact, it should be easy to hit it accidentally in combat (although there are no rules for that).
As a DM, I told my players how easy it is to destroy straight up and they take precautions with the one they have (had, they recently went through a portal that would not allow extra-dimensional objects to travel through, so they temporarily lost the one they had, but they should get it back when they return).
Getting back on the topic of weight carried, I ask my players to keep track of their own weight, but they rarely do. It's kind of annoying, but not important enough that I'm going to do it myself. In fact, that is one of the reasons I allowed a Bag of Holding to enter the game: so that we could ignore most weight issues. Course, it was kind of funny when they filled it up with stuff they generally do not need and now they do not have it.
