janesylvia: "I know TOTO washlet S300 is good. But it's $900, kind of expensive. I don't know if the COCO bidet 9500R (about $450)is as good." Janesylvia, the very fact that we cannot offer an opinion as to the Coco Bidet may be the point of our "opinion" of alternatives to the Toto model. We travel back and forth to Japan several times a year -- and as you know Japan is where the advanced toilet seat technology was invented and is constantly being improved upon. We have seen and "tried" many different models of advanced toilet seats when in Japan (where I happen to be while typing this), but every single one of them was either a Toto model or an Inax model. We have seen other brands, less expensive, of advanced toilet seats for sale in discount stores, but never have we seen any advanced toilet seat that was not either an Inax or a Toto in any public facility or in a home. Inax and Toto completely dominate the Japanese market, which is the most sophisticated market in the world for this specific genre of product. As a matter of personal preference, we prefer the two-wand design of the Inax line -- which allows the posterior cleaning wand and the feminine cleaning wand each to be positioned for the respective optimal angles of incidence of the spray -- to the one-wand design of the Toto models, but that may not be as important to you as it is to us. To underscore the latter, for our own home in the Unted States, we purchased an Inax (the Clessence model that does not have a remote control) for a price about half that of the Toto S300. We are happy with our Inax, and we do not experience the initial "cold moment" that crops up as an issue in the (very positive) Amazon.com reviews of the Coco to you which you linked. Here is a link that might be useful: Other options to consider

I think Crane is part of that group too. Inax can still be found in the US if you look for it - Amazon shows several models. But their service/parts organization is probably not that extensive. There's all kinds of nice plumbing fixtures, cabinetry, and appliances that are impossible to find the US. Japanese stuff at least has the advantage of usually running on 120v / 60Hz unlike European imports.

jimrin: "I'm thinking of getting the Inax Clessence CW-H230-RW (for round toilet seat), which has the control panel attached to the side of the seat, for my mom. However, I cannot find any documentation which says that the spray can be oscillating (automatic movement of the position of the spray back and forth). Does their bidet support that?" The Inax Clessence does not have an oscillation feature. I do not know whether the R-series or L-series Inax seats have that option. The specific model of the two Toto Washlets that are installed in our sister and bother-in-law's home in Kamakura does have that feature, and, being the curious type, I have given it a couple of test drives. Not a feature that I would use even if we had it on ours at home. To be fair, the trial was not apple-to-apples or oranges-to-oranges, because the angle of incidence of the spray from their one-wand Toto Washlet is much closer to horizontal, and the angle of incidence of the spray from our two-wand Inax Clessence is much closer to vertical, than the other. Perhaps I would have liked the oscillating spray more if it were incorporated in a more vertical spray; it is difficult to speculate.

Thank you all for the advice. I went ahead and ordered the bio-bidet. I decided to go with it since it has a hybrid heating system. I read some complaints about others having an initial burst of cold water for a couple seconds before the tankless heaters warmed the water. Our well water is very cold, so even a couple second delay might be shocking!