I have had quite a good experience with Kucoin. It is really a good platform to start with. I could remember when i first lunched into their website for my first trade, it was easy and i was amazed, seeing altcoins doing greatly well on their site. Permit me to say this, if my assumption is right, that altcoins do better on Kucoin than some exchanges, mostly the exchanges that are just coming up.
Also, altcoins, easily find their ways to the Moon on kucoin.