If it's not the best I've ever owned, it's at least among the top three. It feels and looks very well-built, robust, and with high-quality finishes. The click sensation of the buttons is excellent; in fact, it's the first controller I've owned with mouse-style switches. I wanted to try them out, and I don't regret it. Overall, it works very well. I've set up some macros in different profiles for various games, and they behave perfectly. The connection to the wireless receiver is stable and latency-free (I use it for PC gaming, by the way).
I've only had one issue, which is that it disconnects when the battery is low, and then I have trouble pairing it again. It's happened a couple of times, and I think it's something with the BIGBIG WON software. I hope they fix it with a future update.
Overall, it's a great controller for PC gaming, which is where I exclusively use it. It's high-quality, highly configurable, and uses the latest technology. I miss two things: a charging dock and the software interface being translated into Spanish. I understand it because I also speak English, but I have some colleagues who have a harder time understanding it.
It was a good idea to buy it with the case to keep it safe and protected. Also, thank you very much for the free set of joysticks, although I must say that the joystick caps either don't fit or are too tight, so much so that I unfortunately haven't been able to use them.