Excellent stuff!
We always use it, either in handfuls - say a couple per sq yd, or, even better, by putting a few handfuls in a plastic bag, poking a few holes in the bag, and hanging it in a water butt. It's a great liquid manure, and perfect for leeks especially!
We always have some around the Patch and also at home, as it takes up little room too!
It won't do much for bulking out your soil though, you do need other compost to do this.