GDAX crashed and no one could login. As a result, ETH dipped to a low of 338€ vs €317€ in Bitstamp. This is a huge difference. Had I been using Bitstamp, I would have bought a lot more ETH than I ended up buying in GDAX.
Also, I was only able to buy around 340€ because I had Buy Orders pending. Anyone who tried to buy the dip on the fly, was locked out... And when it returned, it was back to 365€ or so.
This is a big disadvantage vs people in other exchanges.
I'm done with GDAX. I'm moving my money back to Europe. I should have never tried an American exchange, in the first place. What was I thinking?
You can't ever trust Americans, Indians, Nigerians or Israelis with your money. They have the highest rate of cheaters and thieves per capita.