Priced the trigger is really great!
I've been using the currently only for macro photography in manual focus mode and as the trigger is just great. In AF I have only tested it briefly, but even there it has worked well.
But there is a small flaw: The button is quite deep set in plastic that you can press hard with a slightly larger thumb, but is a matter of habit. if you know even how the button reacts and how you have to place the larger thumbs it's just good.
Quality is totally OK now would not say that it is a top quality, but it feels not cheap to!
That is why there is for my benefit 4 stars. When the button would be a bit bigger I would loosely be 5 star!
But honestly for the price and the good delivery, the part you can simply block buy spontaneously. Without feeling guilty of having! ;-)