I would say it is "Clear" but I am not sure I would say it is "convincing". There is a reason you developed this service.. why? think problem / solution. I am guessing the issue you are solving is the lack of professionalism a paypal link creates... your service keeps the convenience of paypal with a cleaner more professional path to getting there.

On your 'how it works' page

Design wise your site is good. However, the purpose of the site is far from clear.

I'm a regular paypal user (both as a merchant and purchaser) and after looking at your website, I can really see what you are offering and what benefit it would be to me.

I agree with the other posters. It looks like a paypal type product/site. If you are going to go up against paypal, you need a distinct selling point. Why are you better than paypal? If you clear that up, I think you will be in the right direction. Page does look good though.

The site's purpose becomes clear after a little digging around. But I would never use the service. PayPal's default order form is simple enough. And people trust Paypal. I would never invite a 3rd party to intervene what's already a nervous activity for so many customers.