I would like to share my own point of view and my experience with KuCoin.
KuCoin is one of the beet exchange that has been for decade now, and it has a lot of Crypto-Currency that is enough for every user to trade in.
There mode of exchange currencies is very impressive and so fast, no delay in transaction, with a very low transaction fee at 0.1%
Security-wise they have a very good security option of 2FA to protect the site from been tampered with.
No language limit, they have a good customers service back up.
Their are key point of winning some good bonuses in the platform.