pro - The DT-200 V3 works perfectly with my JX-3P. The metal exterior seems durable. It's far less expensive than a vintage PG-200 controller, which currently sell for a higher price than I paid for my JX-3P. It makes programming the JX-3P far quicker.
con - there is a little bit of wobble on the knobs, they are thin in diameter too. Larger diameter knobs would make fine tuning easier. The knobs might be a little frail for gigging but should be fine for home use.
Overall it has been a good purchase.