Next time try Honda Classic in I-10. Your experience may be different. As already said, you can deny certain jobs and keep the bill low. Going to random tree shade mechanics is not advised or your next post will be:
My car is getting 8km/l! What could it be?
To avoid such problems, stay with a 3S dealer. Just pick a good one. Not all 3S dealer are the same. I have personally had experiences which make me say this.
When the dealer says or advises things like cat cleaning, Injector cleaning etc. etc. ask him to show you evidence of why this work needs to be done. E.G. Catalytic converter can be seen using an inspection camera and so on
I have been a customer of Honda Classic since 2003 (Honda City, Civic 7th gen, Civic X gen, BRV) all looked after by them. I never felt that they charged too much.