The pros are a working USB DMX device for under $10. The Cons are a lot of FTDI chips are fake and can malfunction. On top of that, Apple / Mac does not play will with the FTDI chips and the drivers. Two out of the three FTDI chips I ordered were bad. It took a lot of head scratching before I realized it. Then after getting the one working, I still had to play around with enabling/disabling the FTDI driver, multiple computer restarts, and various USB ports before it became stable. Definitely not a professional solution.
That being said, the ADJ EZ Kling is the least expensive Artnet DMX device that I have found (plus you can skip the USB and send everything over network). It’s larger than the Enttec’s, but also half the price and works about the same.