u will get better rates on markets.. if you know what you are doing.. changelly and blocktrades are good when there isnt too much volatility.. but IF the price is crashing you can end up with a pretty terrible rate and you cant control it.
blocktrades are more reliable .. i have had money stuck for no good reason three times with Changelly. They were good enough to push the money through but i missed the moment!
ouh thank you so much for feedback @eco-alex ! Got the idea of pros and cons eh! exchanges better but in worst case can use! :) cool!