Just installed my second set of these IPW replacement filters for my Watts WP5-50 system. Overall, they do the job well – water tastes noticeably cleaner, especially here in Phoenix where our tap water is basically liquid rock. The sediment filters get NASTY after a few months (proof they're working!).

Pros: Complete kit with all essential filters, including that handy post-filter. Water clarity and taste improved immediately after installation. Cheaper than buying individual OEM replacements.

Cons: Had minor fit issues with the RO membrane – needed some extra TLC during installation. Also, heads up that the 1/4" connectors aren't included (description says this but easy to miss). Saw one reviewer didn't get their post-filter – mine arrived complete though.

Tip: Mark your calendar when installing! The 6-12 month replacement schedule sneaks up fast. These filters work hard, especially in areas with heavy mineral content.

Final verdict: 4/5 stars. Does what it promises but could be more beginner-friendly with installation. Will repurchase when needed – just hoping for slightly better QC on fitment consistency.