Hyatt changed the award redemption value of some of their properties without any notice. Usually, programs (and especially Hyatt) give you notice ahead of time, which gives frequent fliers a chance to lock in bookings.
Some items in Duty Free shops are huge deals (for example, liquor). Other items are a rip-off and you should avoid them.
I had to buy a toothbrush in Zurich and was directed to the Duty Free shop as the only place that sells one. And I ended up paying $15 for a tooth brush. A toothbrush that the cleaning staff of my hotel later accidentally dropped in the bidet.
The Short Final of Travel Update has a post on the age of Allegiant airplanes. Apparently, their practice of purchasing old planes has led to an extremely high rate of operational incidents.