I usually trade on poloniex and it's the best and if the coin is good and you really trust it and if the work is going on in the background for the coin then even ccex bittrex live coin your are also good
Try cex.io also, it is very good and the platform is quite professional. Lots of bitcoin are being traded there on daily basis, I have been using this platform since 2013 (started using it for cloud mining) and never had any problem with them. Honestly I am not thinking of trying any new platform for my bitcoin trading, I believe I am already with the best one.
\
C-cex is running smoothly in few years indeed,but their interface just so boring honestly,if i do say i would prefer to the exchangers with the most attractive interface yet secure and popular,trading on this kind of site will gives us a different impression and it's actually quite awesome rather than the boring ones,just my honest opinion and didn't offend any fan of C-cex
For experience trader will i can say that they are boring but c-cex is totally easy to understand for newbie traders since it is easy to follow and click there market and do trades in that site, and other sites gives so much hard time for those new people since there markets are more sketchy, but i can make sure that c-cex is good site who have fast responsing devs and surely we cannot point them out as scam since they are more choosy for the coins they addes frequently.
I agree with you , c-cex is also a good trading platform because its easy to use unlike on other platforms which is somehow confusing especially to new users same as you said. Actually there are lots of good and reputable trading sites like poloniex , bittrex and c-cex is included and its operating for how many years as of now , as you mentioned they have active devs and support which is a really good sign of a good exchange.
How about yobit? Have you seen there are a lot of coins here to trade? I guess, you will have more fun trading with different coins, if you love to trade altcoins, yobit got the big numbers of altcoins IMO.