Ive bern using coinbase since dec 2015 to purchase bitcoin and everything has gone smoothly until now.
I tried buying bitcoin over the weekend via the mobile android app and it kept giving me an error message stating "an error has occurred...if it persists please contact support@coinbade.com.So I kept trying to  make purchases from 2 different bank accounts...I kept getting the same error and no buy transactions posted to my account...I checked my wells fargo account today and Im.now -$4200  and yet there are no records of these buy transactions on my account .I sent coinbase support an e-mail 3 days ago ...no response yet...now the price of bitcoin has jumped $20 and I had Wells fargo initiate a fraud investigation...this sucks monkey balls..
I advise you to use a different exchange than coinbase...use gemini or someone else.now I have to wait 10 days for wells fargo to conclude their investigation before I get my money back.Dont USE COINBASE !!!!!!!