We have visited this summer Stockholm and Oslo and we bought for both cities the passes and it was a good deal because we really took advantage and visited many museums (and other attractions), used the transportation, however we didn't use the discounts we had for the restaurants (we forgot) and for the bike rentals there is only discount for the bike tour and not for renting individual bike. But overall it worth it and we will buy the card again.

Hard to make the most of this, as there are only so many hours in a day. My advice would be, find an expensive restaurant. That way you will save the most

Free myseums were great and we traveled around the city in different toutes so we saw a lot of Oslo

Well worth investing in. I saved a lot compared to my friends who didn't bother.