ShapeShift does not have any fees. The rate we provide to you before you do your exchange is exactly what you will get minus the miner fee of the receiving coin you choose. The rates update every 30 seconds dependent on the market so we encourage people to wait if the rate we are offering at that time is not pleasing. We do understand, however, our convenience is not for everyone so we understand if you decide not to use our system. Have a great day and let us know if you have more questions on how this works!