some dealers to avoid for service:
colonial honda in glendale, ca - clean shop, but lousy managers, expensive
pasadena honda in pasadena, ca - forgot to put oil my my friends tranny (arbitration to rebuild), messed up his ignition switch recall fix
decent dealer service:
goudy honda in alhambra - pricey, but they honor other's coupons
norm reeves super store in LA - ranked high by bbb
dont forget to ask for your old parts back (to make sure they were replaced) and check your dipsticks and fluid levels. also check for dings, scratches. dont EVER sign a waivier if your car has aftermarket parts. they wont be liable for ANY damage to your car.
**edit** make sure that they dont charge you for services that you didnt ask for!