I find it a bit heavy (it weighs almost 8 pounds without accessories) but there are pockets everywhere and all my essential tools now fit in one well-organized group. I'm so tired of digging through my old bag and getting hit by my drills and sharp tools so I finally bought this and damn I'm glad I have it. The zippers are large and seem reliable. There are no problems with the play of the teeth. The length of the zip is still a bit 'used' to being folded over (I think the bag was held open and the zip was just turned inside out). It seems to take the right (easy to rearchive) path since I keep it zipped most of the time. The bottom is probably why this thing is so heavy. This is a nice thick rubbery material that makes the bag resistant to dirt, water and oily products on the bottom. The fabric that makes up the rest of the bag isn't flimsy either. Good stitching and comfortable top handle. The shoulder straps are my favorite. I can climb attics and carry a bag by the handles. unpleasant. Putting this bad boy on my back frees both hands to climb and crawl without having to push the bag over the ceiling joists or lift and move it every few feet. However, don't throw it in the attic with a full load. it goes straight through the ceiling! Oops.