I for one have found the InsideFlyer mileage offers very useful for capping off my accounts. I have taken advantage of the Starwood promotion and was very happy with how quickly the points posted to my account. I have also given gift subscriptions to everyone that I know who would benefit from reading InsideFlyer. I will also buy a couple of Delta since I have not flown them in awhile and I have some miles that will expire if I don't have any activity.