the roller is an important part to clean if you live in dusty area.
any ac servicing that dont clean roller by default i ban.
I've heard shit about midea but when i stayed in JB serviced apartment they use midea and it worked well. just that i think the compressor sounds crazy loud dunno why
my BTO i used brand new daikin smile series 5 ticks. thought i loved it but for some reason the roller always damn dusty and clogged. my AC filter evey mth sure dirty like fuck. every 6 mths sure need to service if not start dripping water.
then now i use old Mitsubishi starmex 3 ticks, for some reason much cleaner, AC filter like not need clean after a mth. bill also lower than daikin. not apple to apple comparison, but based on my experience, maybe next house likely Mitsubishi.