Dear
I have been in this industry for 7 years and such jobs are my daily practice. This is my first time on this site and hence you can see that I do not have any ratings/testimonials to show you. I can assure you that if you work with me once, you will always work with me for these kind of projects.
I can show examples of previous work in the same field. Your design will be delivered as fast as you want it the moment you choose my bid.
update: I can't reply to your message for a technical reason I guess :S but I hope we work together :)
Best regards.