I also have bad experience in this place (Matara). Once I have done engine tuneup and after about 50 km giving several error messages stopped the car on the road. I have spent about 8000 LKR to rectify the issue in several places but after running several Km error comes out. Finally one guy found that one nut was not properly tighten during engine tune up. After fixing it everything Ok. Then I called them and inform. They did not care much and just say sorry. After that I did not go to the place even for normal service.
In next service I put the car to another place and I was there until they finish the service. When changing the oil filter I found that previously A....M... has put a very chief and low quality filter however, they have charged me for original honda oil filter. Earlier, I have done several services in A...M... but I never checked the filter and things when they are changing items, thinking that they are genuine. But it is not..... Be careful when you go there..........