Looks like a great cheap alternative Norm - great find! I can just make out something hanging off the cross bar behind the seat as well. Might be an accessory tray
Looks like the only downside to that chair is that the height adjustment would require the removal and relocation of the cross bolt that goes through the back of the seat. For $25 though - what a saving over an astro chair. Definitely worth a look on the 15th.
Dean