I have used them in the past, and they are great. they charge by weight, and to have a kayak from GJ to DC was 50.00 and it was thewre in two days.
they are a flight carrier, and the guy/gal dropping the boat off pays, and they don't take cash.
the last boat I bought was an angst, the shipper did a lousy job of packaging, it was wrapped in 6-pack conatiners ( damn boaters)
but the boat was perfect.