I’m a little late to this one. I used to use FFL Boss, it’s a good system, not too pricey, and it is pretty easy to use, no issue with it at all. On the downside, the layout and the dropdown menu selections were a little clumsy IMO, again NOT a functional thing, but I think it could have been cleaner. Bryan told me FFL Boss worked best in Chrome, and so it does. Personally I don’t care for Chrome, that’s just me. You can use a cheap bar code scanner to log in/out serials in the A&D and also print serial number tags from FFL Boss. The digital 4473 is nice as well. They have great customer support, and they are improving the product.
I have since moved to CDS. We had some need that FFL Boss does not offer, and it was cheaper to bundle then in with CDS. Good luck.