glennf, I love Wirecutter but…really? “The easiest way to maintain the Platinum Elite, or any suitcase you own, is to occasionally lubricate the zipper with a waxy or lubricating household substance such as lip balm, crayon wax, or graphite shavings from a pencil.” https://www.nytimes.com/wirecutter/reviews/travelpro-luggage-review/ I cannot imagine how to remember to ever do this.