Do not use Coinbase! They have extremely poor service and will not support you if you ever encounter issues logging in. Instead, they will write a generic response to your ticket and immediately close it. If any major bank tried to pull this they would get buried in lawsuits.
Again, avoid this service at all costs. Forget their greedy 5% fees on deposits/withdrawals - it doesn't even matter if you can't get your BTC or USD back period. That's a 100% fee.
I have never used a coinbaser, but I think we should also know more clearly and in more detail what you mean worst. can you try to explain what is the worst intent in terms of service, fees or anything? please explain so that readers can understand.