I just want to say that I think it is awesome that you are doing this at all and if I was receiving it from my wife, I would be thrilled and there is no question it would be the best Christmas present I ever received from her. The reason why is not only because of the items on the coupons (the wax is my personal favorite, btw) but because of the thought required shows that you really care. At the end of the day, I think that if both spouses care to this level, things will work themselves out. Of course, in my case (and I think most HD cases) only the HD partner appears to care and therin lies the problem. So, great idea.
One suggestion though is that you make sure you follow up and request redemption. Maybe put expiration dates on them, like real coupons. I have done both the homemade variety, and also bought a pack of premade ones (I think at Barnes & Noble) that were really good, and they sat in my wife's drawer. Doesn't sound like your sitch is the same, but I think having a way to follow up after the gift helps with coupons.
Speaking of follow-up, I will be interested in hearing how this goes for you.
PF
Me; 42, W; 43 M; 16 yrs S12, D9
3/13 - "I want to move to XYZ City (four hours away) and it might be without you, not sure" 5/13 - "Not sure I meant that"