just google cuckoo ampang, can find a few...

i'm using both cuckoo and nesh.. water taste like normal..

this depends on what type of water you want for yourself.. there are many debates that RO vs mineral is bad for health.. etc
read more before you decide... there's a discussion as well.. https://forum.lowyat.net/topic/2818346

i did the same survey myself 6 yrs ago and still don't believe in RO water...