Much better than expected!
Knock-offs are usually poor quality and don't work. The GO-TCHA is definitely a knock-off, but with none of the usual problems. Pretty easy to use (a bit of a learning curve but there IS documentation!), functions all work as advertised, battery life is excellent, and it even includes features the original GO Plus lacks (screen, auto-catch/spin). The game sees the device as a GO Plus, so all in-game interactions are the same. The GO-TCHA has settings catch, spin, catch only new Pokémon, vibrate, etc, and to change them you just tap to the desired one and long press the one button to change it. Very easy! I've used it to auto-spin and catch in a high-density pokestop area, and it spins and catches while the phone is in my pocket. Highly recommended!
Verified purchase: Yes | Condition: New