Unfortunately looks like it costs about 9%...
~3% worse exchange rate than coinbase plus a 6% processing fee. It would also be nice if they showed fees somewhere before the whole registration process.
There is a small markup over the spot price and the processing fee.
Trucoin has mentioned as they start to grow and have more volume, they would like to put pressure on their processors to lower the cost. Bitcoin is deemed risky by payment processors because of fraud and because of that it's still an unknown to them, hence the higher fees.
You can't get instant anywhere else that doesn't include some hidden fees (circle)
You also can't get limits that high instantly there either..
When working with visa or MasterCard unfortunately there is no way around interchange fees.