The crypto coins worlds is a jungle of exchanges, alt-coint, web sites, is not easy to navigate inside it.
with a binance i've found a compass for a lot of alt-coin.
I use six or seven cryptocurrency exchange because i invest into emerging coins and always i need to find a right exchange platform that sell it.
Inside Binance i can trade a lot of crypto coins that cannot find in other exchange platform.
The trading fee depend of your level of trading. I've a entry level and the fee is 0,1%.
At the end all exchange platforms are similar, they have a web site, they have an app, you can buy, sell, switch.
For my kind of trading i choose the exchange platform that can trade emerging alt-coin, than most of other platform don't have.