Coinbase are not "legit". "Legit" is a "carder word" used by criminals and low-lifes. """I be LEGIT, bro!" They can't speak correctly so they say sentences like "Oh, dey be Legit, broooooo!" 
Coinbase are a scam, plain and simple. They will look for any reason at all to lock your account, freeze your coins, return your ACH 7 days later, give you a requoted bad price, etc... stay away from them. Go with a "real" btc exchange overseas (but of course not Gox).
Coinbase have many trolls on this board hyping their services with words like "I've tried coinbase and they're great".
-Pffft.
Coinbase are a scam, plain and simple. They will look for any reason at all to lock your account, freeze your coins, return your ACH 7 days later, give you a requoted bad price, etc... stay away from them. Go with a "real" btc exchange overseas (but of course not Gox).
Coinbase have many trolls on this board hyping their services with words like "I've tried coinbase and they're great".
-Pffft.
I haven been using them for a while, no problem. For Buying and Selling, the money is deposit very fast (3Days), and the buying part take a little longer.
The only down fall, is you could only Buy or Sell 50 BTC
If you are verified, you should be good.
As for an exchange, I use BTC-e, for my trading. If you have doubts about me, ask about on BTC-e troll box.