The whole set has some variance in quality.
The face buttons (A, B, X, Y, Start) and dpad are great, feel fairly close to the stuff quality of the buttons in the controller by default. Have installed them and am happy with them so far.The dpad feels a little mushy but i don't tend to use it very often, so this is ok.
The triggers and z button were a little disappointing, given the good quality of the rest of the kit. The plastic on the triggers feels much thinner, as does the z button. The z button also doesn't include the little metal lever inside to click in the internal, which is a shame.
Overall decent, quality of the entire package could be slightly better.