It's a good game, but if you don't want to pay for extra rolls, you're only playing for a few minutes a day. It's hard to get any rewards if you don't buy extra rolls and as I've seen someone else say and I totally agree, if you start buying extras, after some time it only gives you the option to buy the most expensive ones. The albums that you collect stickers for are almost impossible to finish, unless you spend a lot of money.