Top critical review
Great value... until it disappeared
26 July 2018
Bought a twin-pack with one each of a convex and concave button to see which felt better to use. I found convex (raised) is fine for me.
Decided to go with black option rather than anything too garish and these little gems do make a practical improvement to using the shutter.
Surprisingly good quality and highly recommended.
Edit: I originally gave this product a five star review (as above). Unfortunately, I picked up my camera less than an hour after writing it and the button and its washer had gone!
Let's see how long the second one stays on.