I like it a lot actually
I would put the tagline directly under the business name, rather than under the URL. It would make for a cleaner connection between your name and what you do.
Personally I think double sided is the way to go - keep the front clean, then put details on the reverse - in this instance I think the '10% off" could be be removed from the front, placed on the back, and expanded into something with a bit more 'hook'. Its conversion potential Im talking about - in this regard a business card is no different from any other piece of sales copy. The objective being that if someone gets the card (through whatever means) there's something on there that compels them to (a) KEEP IT, and (b) ACT ON IT - ie, phone you seeking services. Im not sure that "10% discount" in-and-of-itself is quite as strong a method as could be achieved by expanding the offer / service benefits on the reverse.
I was in a large chain retailler yesterday and they had cards on the counter "free performance tuneup - value $49. In other words they were quantifying the dollar value of the offer. Im not suggesting this is necessarily THE approach to take -just that there's something in a 'value proposition' thats possibly a bit harder for customers to walk away from. So, what does "10%' mean in real terms? (if you get what I mean)
And/or services list expanded. Dont rely on people visiting the site to get info. Some people will only act if they can see what they want immediately. One approach is to make this available to circumvent a 'leak' between business card - website or business card - phone call.
I also think its worth adding a QR code if there's space. Once someone has scanned it, you're always in their devices, even if they lose the card. Its another way of making yourself 'stick'
Good work though. It looks really nice
Oh - one more thing - make sure you have (if you havent already) considered the bleed space required by the printer around the edge of the card. This is a common mistake people make by putting info too near the edge - you may have factored this already - I just mention it because it can save time on moving everything if the measurements havent been implemented at the outset.
Jim
