Review on iSpring F15 75 - 5 Stage Reverse Osmosis System by Tay Tran

I've been using basic "universal" filters in my 5-stage iSpring for a while, but I needed a 5-year basic service, so I ordered this pack. I watched a few tutorial videos on YouTube before starting the service but knowing that I was able to change all the filters including the reverse osmosis unit. It was pretty easy and took about an hour total. The new 5th stage (Polish) filter had different connectors than my old iSpring system, but this pack also came with adapters so I could use the new connectors as well. This package is sufficient for a full 5-year usage. Maintenance, as well as annual maintenance and an additional 6-month maintenance are included. I believe iSpring's basic filters have also come down in price as they don't seem to be much more expensive than generics, so I would definitely buy these (or the smaller 6 month/1 year packs) again.