An excellent controller, with some minor flaws

This controller felt like a dream come true when I bought it. It was nice and comfy for my big hands, although my wife complained it was too big for hers (ok, let's not take this the wrong way.)
Customisation options are incredible. The range of motion of the analog sticks can be adjusted with swappable stems and hats. Dead-zones and sensitivity of shoulder buttons and analog sticks can all be adjusted via software. Even the weight can be fine-tuned with some add-on weights.
The controller itself feels very solid, buttons are nice and tactile, but shoulder buttons have a really long travel which is not adjustable. This may be an issue for those who play fps games and like a hair trigger, or people like me who play monster hunter and just want a single-click response.
Extra buttons under the grips let you map existing buttons onto it, but to be honest I haven't actually found a use for them. They are hard to press enough that I do not accidentally trigger them, but I find pressing them to be a little awkward, and I have to change my grip slightly to press them which affects my control over the other buttons.
Over time my controller developed sticky face buttons which was an issue when button-mashing, but some alcohol and compressed air restored it. R2 and L2 are squeaky too, which I have yet to fix.
Overall it was a really good controller, but with the release of the Xbox Elite 2, I would recommend that over the Nacon anytime. The Elite 2 places your wrists at a much more comfortable angle, analog tension and R2/L2 travel are both adjustable. Buttons also felt a lot more clicky and tactile, but I did have to return 2 of them because the A button was missing presses.