Well made, robust, and water resistant fabric. However, in the interest of improving the design and helping others I would note a couple of things.
If you are holding the bag by the side handle, the zips on the external pockets close on the downward side; consequently, if the pockets are not totally closed, your items can and will fall out... This could be easily remedied in manufacturing.
Note that this is made for big guitars, I had a 175 copy in it, with Bigsby, and there was plenty of room. The downside of this is that the plastic leatherette fabric can form creases, along the lines where it was folded in transit, and if not stretched out can crack within a few months. My first bag did this (and was replaced by Thomann), the second one I padded and stretched out for a few days before using, and it lasted a couple of years of daily use before the side handle and shoulder strap attachments tore.