If you need to carry a lot of different tools, this is the pack for you. I'm a facilities and operations manager for a housing complex with 1000 residents. 23 buildings, 322 units, 994 bed and baths. Our buildings are 4 floors, so I was looking for something to eliminate the need for back and forth trips. I may have taken it to the extreme, but I had it packed full. It weighed almost 100 lbs, but I was able to hold a 20 volt Dewalt drill, spare battery, charger, the small organizer it comes with, full screwdriver set, electrical tools, meters, hand tools, 2 1/4 inch socket sets, hammer, pry bars, file set, and the list goes on. The only thing I couldn't fit were my gauges, but they would have fit if I didn't it full of everything else. The straps are comfortable, and eliminate fatigue if you have a lot of travel between work areas. The exterior is quite durable, and though it is not rated as being water proof, my pack saw a lot of rain and snow, and I never had an issue with water intrusion on the inside. Improvements I would like to see would be a molded bottom, as I had a lot of weight it was not very stable, and every time I would open a pocket, the whole thing would fall over, but that is a very minor inconvenience. Also, even if just plastic, a little reinforcement under the back padding would be nice, if the tools in the back compartment shift they will poke you. Again, just a minor inconvenience to organize better. In the end, travel was my bags demise. I had to drop the weight to fly, the first 3 trips it was mint and so were my tools. Then the airline lost my bag, flew it around the country, and had to Fed-Ex it back to me. Upon arrival the organizer was smashed to pieces, the exterior was torn to pieces, tools were missing, the straps were broke. It looked like it went through a wood chipper. The bag is extremely durable, but not invincible. I am on here to buy another, and thought I would write this. If you have a lot to carry, highly recommend. The elastic pouch on the inside will hold a laptop, I carried mine for months, just get a hard cover for it. The picture will show everything I took out of the bag when I had to reduce weight to fly, minus the hammer drill. I had the bag for a year before it met its demise, without a stitch coming undone. I put this bag through the ringer, so if you have any questions, feel free to ask. TIP: when you receive it brand new, it will be very rigid. I recommend over-packing it and zipping it shut, and leaving it sit for a day or two so the fabric loosens a little.