From my experience I believe the synchronise button on the left is too similar to the stop sign used in many countries.
I often need to use the stop icon when the mount is doing something unpredicated and under those circumstances I have on a number occasions clicked the synch instead of the stop. The sort of thing you do when in a panic and don't have time to think.
My suggestion is to change the stop icon to a red octagon and the synchronise icon to an equals symbol without any red.
I also struggle with the goto symbol which is hard to recognise as meaningful at the size presented on a small screen.
Does anyone have any thoughts on this - am I the only one?