Coinmate is a UK-based cryptocurrency exchange, launched in 2013. According to its official website, the exchange is aimed at Security, Speed, and Reliability.
They put Security on the third place, but according to the reviews, the community is pretty confident in trusting funds to this exchange. Fiat deposits also make life easier for European traders (because of EUR deposits). Withdrawal fees are pretty average for the industry thus making it possible to make profits if you trade wisely.