I won around 10 premium gold packs and I also bought around 10 premium gold packs. I think my most valuable player was about 10k. Usually my pack was only worth like 2k. So the packs are absolutly shit.
I tryed 5 special packs who were available 2 months ago. One pack was 25k. This time I was lucky. I got Casillas, Buffon and Sergio Rames out of these 5 packs.
So I stopped buying the normal premium 7.5k packs because they're just shit. On the other hand the special premium packs who are available sometimes for like 25k seem to be worth the money.