Help us test BookWithMatrix: find a trip that doesn't work and you'll get $5

Hey everyone, this is the creator here! We've created this tool to book flights found on ITA Matrix (https://matrix.itasoftware.com), a powerful flight search tool. We loved the tool, but it doesn't let you book, so we tried to make that part easier.

We've already tested it a bunch, but would love the HN community's feedback. If you find an itinerary that, when pasted into BookWithMatrix, gives an "Invalid itinerary" error message, we'll buy you a drink or send you $5!