Coinbase is good,i use that exchange since 2 years ago,,and never got problemto use that exchange,and i lov the wallet,low fees and fast. but when i see people talk about coinbase is not good anymore,i start to hasitant about it,even so far its going fine.
In all ranks i know Coinbase is considered as the most safest online exchange and wallet. Also can be recommended for new customers, because is very easy to use.
But actually all of exchanges from list above, besides Cryptsy of course, is quite good.