This month they have trade in old filter, don't know if it apply for other filter. We change the old Amway filter (i think almost 20 years usage) for the current unit.  Cartridges will be on the high side. But at least you don't have to keep your receipt to buy consumable.

pro...
one of the best if not the best

cons
$$$ on initial payment

You want to place the filter undersink or counter top?
If undersink, you need to find out whether eSpring can withstand the water pressure from the main in your area.(assuming you plan to install it at the kitchen sink).
ESpring is designed as counter top filter. In counter top installation, control valve (your faucet) is installed before the filter thus no water pressure in the filter when filter is not in use. However in undersink installation, the control valve is installed after the filter, which means high water pressure from the main water supply remain in the filter and its tubing at all times. One forumer here reported that his eSpring undersink installation burst several times.
There are suggestion to instal additional control valve before the filter to lower down the water pressure remain in the filter but the downside is your filtered water stream will be weak and slow.

If you want to place t it on counter top, then no problem.

Pros:
- Able to filter 140 contaminants
- certified by NSF 42, 53, 55 401
- Worry free (if it is faulty, it will blink and beep; if cartridge needs to change, it will also blink and beep)
- Record the usage (each cartridge can filter 5000 litres)
- Low maintenance (only need to change the cartridge)
- One cartridge member price is RM583 (RM583 / 5000 litre = RM0.12/litre)
- This month got trade-in program where you can get a rebate of RM400

Cons:
- High initial investment (you can opt for 12 months 0% installment plan)

This is the second time you didn't read my post properly before jumping into conclusion. I said tap water is safe to drink AFTER IT WAS FILTERED. If go by your logic, eSpring is not safe to drink from the tap too.

As for the UV, no need to feel threatened by a cheap and affordable RM100 UV filter alternative, you did mention earlier that selling eSpring is just your side income right ? but from the way you protect eSpring all out and jumped up to shoot down any cheaper water purification alternative whenever you see one shows that you are an overzealous full time Amway salesman.

Because eSpring has UV, you tell the forum Chlorine can't kill all micro biological, you silent about the Chlorine disinfection effectiveness just like you silent about 3M C-Complete NSF certification in earlier post. Your post is misleading and very much sales talk. Of course nothing is 100%, but I guess Chlorine can kill 98% of the microbes if not 99% ? Pay RM4K for eSpring just to kill the remaining 1% microbes is overkill. One can boil the water or have cheaper external UV filter for this purpose. After all UV is not a must, any NSF certified filtered water is safe to drink from the tap.

eSpring has its own market for those who are willing to pay for it. You should go after this market segment. Don't mislead consumers who are not keen to pay 3k - 4K for water filter that cheaper machine is not good.

Anyway, I think eSpring is a good water filter but it just way too overpriced because of multi level marketing. Why pay more when one can have safe and clean NSF certified water at 80% less than eSpring price?

Btw, I don't sell water filter, I'm just the end user of Panasonic, eSpring, Elken RO, Culligan IC-Ez-4, 3M in the past and present.