Switching from Amway to Panasonic, because...
1) Amway filter and the uv light more costly - about RM600 vs Panasonic about RM250-300
2) the filter & uv light must get from Amway vs Panasonic filter can get almost every where
3) mine Amway water filter machine was the 2nd generation unit, I felt Amway was forcing old customer changing to newer water filter every few years...worry no more supply or price hike for the older generation filter replacement

I have no experience with the RUBINE alkaline water filter system, I can't comment about it.

I picked Panasonic alkaline because I was introduced the "Kangen water system" by a friend and I cannot afford the Kangen product (about 6-7 times more costly than the Panasonic), the Panasonic machine and filter replacement are made in Japan, same origin as Kangen,  Its quality should be on par as Kangen (or quite close to Kangen) Further more, I have been using the cheap Panasonic filter system (also made in Japan) for years... and my house has full of Panasonic products... full of confidence...haha 

The Panasonic alkaline water system can choose 3 levels of Alkaline value and a purified water (non-electrolyzed), my family drink about 70% of purified water (non-electrolyzed) and 30% alkaline a day, so far we don't have diarrhea or cough... but we notice when we are having sore throat, by drinking more alkaline water, it helps fast recovering discomfort of our throat 

Yup! This was the one, i bought it in 2005 and changed to Panasonic in 2014. It serve me well and it was time to change a new one, I opted Panasonic over the Amway.