Honda 3S centre nowadays have all been upgraded in facility to deliver better customer experience, esp during waiting time (free food & drinks & WIFI etc)
Perhaps except of few SC, generally they are quite similar in existence. Reason being all of them are guided by SOP & so is all the parts prices are controlled too. Of course, those aged 3s centre may not as big as those new ones around for merely less than 3-5 yrs. New ones obviously stand out to be preferred choice than old ones.

The only improvement Honda SC should have is to reduce waiting time. Very often, a lot of SC still required customer to drop the car whole day even just for normal servicing, esp on weekdays (E.g Sumber Auto is one that need whole day for sure).

Of course, another area that we may find hard to accept is the labour charges. They do not need to provide normal service to Honda CRV for 2.8 hrs, but system is pre-set for all the car models in terms of man-service-hour, to determine labor charge.

Side note: there are some 3S open on Sunday as well. This could relieve those who can't service their car from Monday-Sat due to commitment.