Had the WD-D6 under sink Filter for one year My first filter unit purchase from Amazon was returned because the box was not sealed completely or properly. My second purchase was direct from Waterdrop, not that it mattered because it was sent through Amazon. The original filter produced water 12 to 15ppm TDS. The new replacement filter 6 to 10ppm TDS. Down from city water 240 to 280ppm. This does result in reduce water flow rate and requires a longer time to fill a bottle. Not sure what the difference is between the GE filters, maybe normal variation in the osmosis filter pore size. I explained the packing issue to Waterdrop CSR a few times now. Please safety seal all your packages so the customer can verify it’s a new product. Used products maybe being recycled by Amazon, based on open packaging evidence.