Update 04/01/23. I bought a 2nd one for an elongated toilet. The installation was easier this time since I ignored the instructions from the manual lol. Better instructions:1. Turn off the water and drain the toilet bowl tank.2. Put a pan under for water leakage and disconnect the inlet hose from the tank bottom.3. Connect the water inlet hose and L shaped end of white bidet hose to T adapter. It's easier to do this before you install the T.2. Connect T to tank.3. Then installed the mounting bracket, in my case, as far from the water tank as it would let me so the seat can snap into place later. Pull the bracket towards you as you tighten the screws. Make sure the washer is installed the way the picture shows in manual (the only time I followed the manual).4. Attach the bidet hose to toilet seat5. Slide toilet seat onto mounting bracket until you hear a click. Check the button on the side to make sure it is not still depressed. When properly in place the toilet seat does not shift at all. Try pulling the seat towards you. If it slides forward, you didn't push it in far enough. This is the cause of all the reviews who say the toilet slides, shifts, or doesn't stay in place.Important: Ignore the instructions about turning it 1/4 past hand tightening with a wrench. You only need to hand tighten. In my first install, I used a wrench and overtightened it causing it to leak until I added plumbers tape. This time I only hand tightened, no plumbers tape and everything was fine. You just need to tighten it as much as you can by hand. These hoses all have rubber gaskets that will create a seal. If you overtighten it, the seal won't work properly and you will get a leak. Plumbers never use a wrench on these kind of connections which I learned later. You can always tighten with a wrench if you see any part leaking after you install. In my case, that wasnt needed. For reference, I have left my original review. Note that I no longer have a problem with wiggle in that toilet either after fixing it.After more 2 years, the 1st bidet is still working great! I've had to remove the spray tip a few times to clean it (easy), but otherwise no maintenance needed and no leaking. I still think this is a great manual biddet and that the bad reviews are due to bad installation. I don't know what people are doing to break that lever, for example. Did they twist so hard it somehow broke? Now my only wish is that I had an outlet behind my toilet bowl so I can install an electronic bidet. Cold water bidet in a new York winter is brutal! Lol But way better than not having one at all.05/30/21 original review. I almost didn't buy this due to some of the reviews, but I'm glad I did. Replaced my tiny Dual Max Toto toilet seat (round) with this one. The hole is the same size length, a bit wider on the sides which is nice. I wish it was longer but I've already resigned myself to fate having gotten used to the tiny Toto seat. The seat stays up when needed and soft closes. It covers the entire back of my toilet so there are less places for dirt to show, and it comes off easily for cleaning.1. Pretty easy to install. I overthreaded the t valve and had a scare (it leaked immediately from the little water left on the bottom of the tank), but was fine when I loosened it a bit. Do not overtighten like I did! Lol. Got smarter and used plumber's tape on all connections and only tightened with channellock one quarter turn.2. The quality of the hardware and materials is superior. I don't understand the reviewers who said the washer was too small. It needs to be installed the long way. Of course if you align it on the long end with the hole it's not going to work. The picture in the instructions clearly show the proper way to install it. Don't worry about those reviews. It's simply improper installation. Actually, 99% of the bad reviews are due to improper installation.3. The lever looks great and fit into my tight alcove no problem. Using the lever is a breeze and I love that you can adjust the position of the jet.4. The water pressure is great and strong on full blast. I love that different size jets were included but they weren't needed in my case.5. The seat does move a bit from side to side (my older seat also did that though not as much) and has a tendency to slightly skew to one side after using the lever which is a bit annoying. It's probably an intentional design to allow some give for the quick detach feature but it is annoying and one reviewer mentioned putting a piece of plastic to hold it in place which I might try.6. Finally, I love the white hose. Nice touch, way nicer than my other hose connection and it really helps to hide it visually.Overall, a great bidet. Time will tell if it lasts. But I trust Kohler way more than anything else out there at this price range.