In 2023 I purchased a Polar White Fender Player Strat as a 'pickup and play' guitar (I own several guitars). At the time the Player 'Plus' version was already out which I believe had a treble bleed, but I was not a fan of the original gradient colours. Over the last year I have been adding some upgrades to my white strat - I actually quite like the pickups it came with, so kept them in but added locking tuners, a 920D Custom S5W Upgraded 5-Way Wiring Harness and now the Tone Saver.
For context - I usually make these upgrades out of curiosity as I know it rarely makes much of a difference, but the Fender Tone Saver surprised me in a big way.
There is a very noticeable improvement in the retention and clarity of the highs (and high harmonics?) at lower volumes which sounds incredible when playing blues etc clean.
Adding a touch of overdrive makes it even more apparent and notes seem much more articulate, which sounds amazing when playing chord voicings, triads etc with the brighter strings.
Bottom line is my modest (MIM!) Player strat now gets more play time than an American Fender AV II 57 Strat I have here and it sound incredible.
Overall I consider this a real value for money upgrade and if you have some soldering experience, its really not difficult to install.