I'm buying a 1997 Camry 2.2L automatic tomorrow and will change the timing belt immediately. A Toyota dealer in town has a service coupon for $229.99 to change it, what's the catch? Is it a good deal?

Here's the link to the dealer special:

2004 VW Beetle TDI 163k
(Yeah it's a chick car but it gets me 40 mpg)