I am using stex.com for quite some time now, and think it is time to review this platform.
stex.com was formerly known as stocks.exchange and changed it's name in 2017, iirc. stex.com is registered in Estonia.
What to expect
On stex.com you can not only buy many different well known CryptoCoins like Bitcoin, Ethereum or LiteCoin but also lesser known coins like Semux, Mox or Bytecoin - coinmarketcap lists more than 250 market pairs for this exchange, which is quite much!
CMC lists the exchange ranked 177 with a daily volume of ~ 47.000.000 USD. The ExchangeScore is 3.5 - which does not seem very good.
Indeed, liquidity is not the best on this exchange - but for many smaller coins, this is a good place to go.
stex.com offers buying cryptos directly via different types of payment methods like some visa/mastercard credit cards, ApplePay, Bancontact and iDeal - I did not use yet any of them - so, I cannot give you any details on that
Personal Experience
I am using stex.com for trading smaller coins like Semux and experienced an overall good reliability of the plattform. Security seems good, payouts are fast and secured by 2FA.
The tools for trading cryptocurrencies are easy to use and stex.com offers a good variety of useful widgets on their trading page. Order books, market depth, adjustable candle graphs and a good overview over your market activites complete the package.
Personal Rating 7/10
The clever UI, fast responding page and great variety of cryptos are the pros of stex.com
Low market volumes are the only drawback I can tell - but this one is a big one: you want to trade now and not to wait - this plattform could frustrate you. Lesser known coins sometimes lack of volume at all, but sometimes, it's the only exchange listing them.
Suggestion
I think, if stex.com got some more users to trade, the volume could increase and make this a great exchange!