Got this from SYABAS website
Q 12 - Is the treated water supplied by SYABAS clean and safe to drink directly from tap?
A - Yes. The quality of water supplied to the consumers is safe for consumption direct from the tap as the water quality is constantly monitored to ensure it is always well within the Quality Assurance Programme (QAP) and National Standard for Drinking Water Quality (NSDWQ) under the Ministry of Health and as being well within the requirements of the Mandatory Level of Service (MLS) under the Concession Agreement. However, consumers must periodically check their home internal plumbing and clean the water tank, if necessary. The presence of galvanized iron pipes in the home plumbing system and metal storage tanks normally will cause water to be yellowish/ brownish.
http://www.syabas.com.my/consumer/frequent...stions-faqs#q12

When choosing water filter system, you should concern about the technology used and the quality of it. Most of the time we only buy once or twice water filter system in our life, so price shouldn't be the main concern.