This doesn't appear to be available to a nonsubscriber, so can't comment on the tips. But we booked a tour for 3 of us recently through Costco for an Insight tour. The price was good and it seemed to go fine. Our only glitch was that they apparently don't book the airline tickets when you sign up but wait until much closer to the departure date. We have priority status on Delta and wanted to do sear assignments but they weren't available yet. The best surprise…the healthy Costco rebate check we got a few months later. I'd forgotten that they would give us a rebate on travel, too, and it boosted our normally small rebate check to over a thousand dollars