A comment
I will say right away that when I purchased this model of the Wisa installation, I was just lucky. The design of the product is quite complex and may not be suitable for many bathrooms. Externally, the installation looks elegant and original. For these lies a complex structure that not every professional plumber will correctly assemble and install on their own. In addition, during installation, access to some mounting and technological units of the drain mechanism is rather difficult, so it is almost impossible to install such an installation on your own.
The device is quite complicated for further maintenance, it requires careful initial adjustment of the water intake level, carved drain mechanisms, etc. The cost is consistent with the quality of the product. The shape of the bowl prevents the formation of splashes.
pros
compact, stylish, original design
Minuses
high cost, complex design, the need for periodic maintenance