The ease to use, the speed at which things can happen with this software has been phenomenal! I cannot stress enough how much better my time management skills have improved since using it for inventory control purposes only. At first i was confused by some features but after talking through them they became easy once realized what all those buttons did. There are a few minor bugs here or there from time to time however nothing major so far. Be sure you understand exactly why you want an open source system as opposed to something else before jumping into anything. You will gain knowledge about everything needed to run any business. We do not need to be wasting our resources managing stock levels when we should instead focus on production needs.