Overall, good, but unorthodox
Strengths
You urgently need to introduce retail-friendly payment options like Paypal and CC. It looks v suspicious to consumers when you ask them to wire the money directly to your account. I would expect to pay up front.
Make the 'number of pages' field a user entry one, not a drop down menu. It took a long time to scroll down to 180!
Also, your delivery time doesn't make sense. You can type in whatever you like (I did next day), but it doesn't guarantee next-day delivery.
I had no idea that the documents had been dispatched, so, though they came quickly, it was a surprise.
Improvements or suggestions
You should be able to track this yourself using free Google Analytics.
I think I looked for 'cheap copying'