SWEET! Thanks OP, I got one and so did some of my family members. I saw another deal like this recently but I missed out on it, glad you posted about today's!
FYI to anyone else who purchases: groupon said there was a 2 hour delay when I placed my order, I went to My Groupons anyway and there it was with a note saying my starbucks card had been cancelled but I could get a refund- it's a lie. Do NOT freak out, just click on the left where it says Redeem Online and your Starbucks card will pop up. All 3 of us in my family were able to immediately put the cards on our starbucks apps with no difficulties at all.