Purchased this product a little over a month ago to augment/replace a similar style sling pack from another vendor.  My old pack was 10x9x7" and functioned well as a carryall for my photography equipment and misc. gear when in the field.  However I will be needing a larger gear bag for a job this summer and so purchased this.

This being winter, I've only had one chance to really use the bag in the field, loaded with about 20Lbs of gear and a 1 quart bottle of water.  The Mongo easily swallowed up my cameras, notebook, snacks, GPS and GMRS radio plus extra misc. equipment.  I spent about two hours carrying the Mongo and it rode well on my shoulder without causing any undo fatigue.  This summer I'll be in the field for 8 hours a day, 5 days a week and I'm looking forward to having a well made, comfortable bag to carry my equipment with me.  I'm sure this will fill the bill nicely.

I have also tried using the Mongo as my EDC bag since I purchased it and, frankly, I keep going back to my old brief case.  Part of this is due to the Mongo being slightly smaller then my brief case and part of this is due to me being unable to load the Mongo as well as my old brief case.  Don't get me wrong, I can get everything IN the Mongo, it just doesn't seem as organized to me.  Perhaps with time I'll get that all figured out but for now I'm sticking with my old bag.

The conceal and carry part is of no interest to me.  I don't have a license and when I DO carry a pistol I'd prefer it out in the open where I can get to it quicker.  Similarly, I won't be using this as a "manly diaper bag" as the kiddo is well past that stage.  However, I can see the Mongo would do admirably in both rolls.

The BEST part of the Mongo is the price.  I think it's well worth the price charged here on Amazon, but I got mine for about $40 less since it was a returned, unused item.  Eat your heart out - LOL!