Hello fello steemers!
Crypto Newby with a question of the day regarding the best exchange to use to buy Bitcoin etc... I currently use Coinbase and it's very simple to use and easy to understand. It does take quite some time to transfer USD to Bitcoin, which makes it hard sometimes to buy something that u want to invest in immediately. I've seen it take up to two weeks to transfer funds and that's ridiculous. So I began to research quicker exchanges that could process USD quickly and cost effective. I came across a video on GDax, another exchange with lower fees. Not too familiar with this platform or the turn around time on deposits. I know my cryptocurrency gurus are familiar with this already so please feel free to drop a line or two. Share any information on other exchanges for US that are much quicker turn around than Coinbase. 
If your Buys are Disabled by the Assholios at Coinbase then you cannot Log into GDAX or make any purchases.
CEX.io actually cares about their customers and responds if they have an issue. https://cex.io/r/0/up107988344/0/
You can tell GDAX customer service has the same email system that Coinbase uses even though they are little better in responding to issues GDAX Is Coinbase in terms of the functionality and service a person receives.
https://steemit.com/coinbase/@zackcovell/toxic-coinbase
Coinbase and GDAX are the same. You deposit money into Coinbase and move the USD to your GDAX wallet so you can place limit buys and avoid the high fees associated with Coinbase. Then you move your funds elsewhere.
I will typically buy ETH and send it to another exchange and convert it there to whatever I want to buy (or hold) because the transfer fee's are lower