Thanks, it is a useful option, though always subject to weather issues at this time of year. Though more expensive, I do find VIA/Amtrak a good option since the rails don't get tied up in traffic on this route, and while the customs wait is longer one remains comfortably at one's seat and there's no need to go through the "perp walk" at customs/immigration (complete with the dogs sniffing through the luggage)!