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much higher than on bittrex (or any other exchange). Dont use Changelly, there is also a higher chance that your coins get lost... better use an exchange!

Fees are higher, yes. That said, just depends on the trade, I'll give you an example:

Right now, I could trade 1 BTC for 14.96 DASH on Changelly.

changelly.png

If I do that same trade on Bittrex right now, I will get 14.98 DASH.

Bittrex.png

So practically, speaking there is little difference so long as you are getting solid quotes from Changelly. I suggest always checking what you are quoted to make sure the exchange is decent. Where the real advantage is, is if your account was locked up or something or your exchange did not support the coin you needed to trade, then I would definitely suggest looking at Changelly.

I do use changelly when I am in a pinch. It also allows you to do things which might not otherwise be possible.