Nice and neat rundown. The exchanges you mentioned are very reputable, and even in the event that a hack would happen, it is very likely that these companies would handle it in a way that minimizes customer loss.

I wouldn't recommend these for more frequent trades that don't involve fiat money simply because the fees are just not the best. Personally I almost exclusively go to Switchain since it gives you a comparison of different exchanges for each trading pair and shows you the best deal for free.