Product review (5 stars): Good value!!
At first it tasted weird, but after a couple of uses, the water tasted great again. So I supposed it needed to go through some priming.
One thing though, went into the ANSI/NSF site and this model EFF-6013A is not in their list of certified products. The box has the following statement: "All materials are tested and certified against ANSI/NSF Standard" .  But the approved seal is not printed in the box. Here the results of the search in NSF listing: NSF/ANSI 42 Drinking Water Treatment Units - Aesthetic Effects NOTE: All Replacement Elements Are Components. HongKong Ecoaqua Co., Limited / Qingdao Ecopure Filter Co., Ltd. No. 266 Yanqing Arterial Highway Economic Development Zone  Jimo, Qingdao 266200  China  86 532 8755 4398
Facility : Qingdao, China COMPONENTS: Filter Cartridges[1]
EFF-6001A
EFF-6002A
EFF-6005A
EFF-6007A
EFF-6011A
EFF-6014A
EFF-6015A
EFF-6022A
EFF-6023A
EFF-6032A
EFF-6032B
GGN-508-WRPL
GGN-510-WRPL
GGN-529-073A
GGN-529-081A
GGN-701-WRPL
GGN-726-003A
GGN-GenE1-103
GGN-GenE1-104
GGN-L002A
GGN-L700P
GGN-PAN-760
WF285
WF288
WF289
WF290
WF293
WF295
[1] Conforms to the material and structural integrity requirements only. "as you can see EFF-6013A is nowhere in this list"