thanks for the info... so it changes the way your finger actuates the shutter.
hmm, i never tried the 'trigger' method. something new to check out!
there are lots of verities of soft releases, alside of concave vs convex, they also come in varying sizes. just to name a few: luigi (concave / convex), leica, nikon (ar-9), de camera consultant (same as chiif, concave / convex), tim isaac(beep / boop / bip / bug / beast), rapidwinder...
does it work for me? i like one on the m8, but prefer to go without it on the m7. it depends on how you "feel" the trigger, esp how comfortable you are at finding the tigger point.