I ordered the Toto S7 washlet to be installed on an older Toto Aquia II skirted toilet. Shipping was efficient, and well packed. Install was easy and the unit feels secure. Specific to the S7, the pre-mist function is nice and seems to help keep the bowl cleaner, the warm seat is comfortable and easy to adjust, warm water, pressure, angle adjustments, and air dryer are all nice features that really improve the daily experience - it's hard to believe bidets/washlets are not more common in the US, it's quick and easy to be infinitely cleaner than using tp alone. The bowl light and nightlight to me are a miss - too bright, and too cool of a light color to be useful as a night light - the lights are also a bit confusing to adjust with the remote, feels like those settings could be simplified. We haven't set up custom user settings, but just make sure to hang onto the user manual, since changing settings is not intuitive just by looking at the remote buttons.
As for install - a little plumbers tape fixed one minor drip at the adapter connection. I already had an additional hose extension between my water supply line and my tank, so I just needed to add the T-valve between the two 3/8" lines and the the Toto washlet line along with (1) THP3141 Washlet Hose 1/2" Adapter to make that work - I also added the Bidet King filter in between them since we have pretty hard water.
As many others have said, the Bidet King filter had the label on backwards, so the arrow marking the flow direction is backwards. It works fine if you know to flip it, but this should be an easy fix to avoid confusing people.
My setup worked perfectly, but there's another review somewhere here that says you need two of the 1/2" adapters to install this washlet, which is not the case. I asked customer service to clarify this because based on how I envisioned the install working, the idea of 2 adapters didn't make sense. They weren't able to provide any useful help, and basically just said to read the product information... I just went with my intuition based on how I believed it should work, so my only critique is that the service team should be better informed about how the various parts go together, and Bidet King should provide some installed photos or diagrams to help people understand where the various adapters go.