My personal experience about binance its quite fast, stable and secure. But lately binance has been marked as a controversial exchange in my eyes because they make IEO in their PLATFORM called as binance launch pad and the project oftenly offer a very limited supply for IEO. Example Wink project only offer 5% of its circulation for public IEO. What's become my concern was about decentralisation. In my opinion holding a huge supply of coins than the circulation
its suspicious and extremly vulnerable to price manipulation!
I have no idea why binance keep adding more and more coins with very small allocation for public IEO. Bitcoin has been an inspiration for decentralisation but now days the overcrowd blockchain project are just centralized and supported by such a huge exchange like binance. Kinda dissappointed.
My other concern about trading in binance is too tight competition and was dominated by the whales. Specially low satoshis coin. If you get into the wrong position, you will need to wait for a long time to get your order executed because the buy wall or sell wall just really huge.