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Check out the plane's interior for your next flight
Sitting for hours in a cramped metal tube isn't generally much fun, unless you have pockets deep enough to hang out in first class. If you'd like a more comprehensive look at the plane you've booked yourself on, then Seatguru can give you airline seat maps, flight updates and photos.
In addition, previous fliers are able to comment on particular craft or flights.
One of the coolest features available on the website is a Beta comparison service between different economy flights. The prices vary -- as does seat width and leg room.