On a related note, I hear horror stories on /r/bitcoin all the time about bank accounts being shut down over supposed BTC activity. Does your service have a solution or guidance for this?
This isn't just related to user accounts; business accounts are frequently shut down (and not approved) because of Bitcoin activity. Coinapult closed operations in the US entirely because of this.
Our main feature is our execution; we are good at optimizing trade execution so you get the best price possible.
There are many banks in the US with very different rules so it is difficult to give a general answer. Have you heard of these stories from customers when buying and selling from coinbase?
