Pump sump or Baufix? Who is familiar with it?

We are about to start construction. In the basement, there will be a washing machine and a condenser dryer, as well as a hand washbasin, which will presumably be used only rarely. The architect is now asking us whether we want to build a pump sump or install a "Jung Baufix" as a plastic prefabricated part; the trend is towards the Baufix. The floor drain is already integrated into the lid there.

Does anyone know the system? I can get parts for the pump sump cheaper through a company, but it has higher installation costs than the Baufix. The Baufix is available in 50, 100, or 200-liter volumes; does anyone know if the 100-liter size is sufficient for the above application? Or should one dimension it a bit larger so that the pump does not have to start as often?

I can't say anything about Baufix except that the prices would deter me.

We installed a pump sump decades ago afterwards.

Briefly described how it was done.
Since the basement floor consisted of only a few centimeters of concrete, it was easy to realize.

Simply dug a hole estimated at 1x1x0.9 meters. Pipes from the sink, washing machine, existing basement drain, and a piece of pipe (for the hose to the sewage line) were laid to the hole. Formwork was installed, concrete poured. When this was finished, the formwork was removed, the wastewater pump was connected to the sewage line via a hose, and then the pump was placed on a brick in the sump. The hole was closed with a galvanized walkable plate and the matter was done.

Depending on how much washing is done, the sludge should be removed every few years. For this, the pump is simply placed in the sludge and then pumped out with a lot of water.

With this size, you can even climb into the hole in case of emergency.

Construction costs not particularly high.

Since you have to plan a corresponding opening in your floor slab anyway, I would not use this for an expensive and comparatively small Baufix but rather make a pump sump.

But that's just my opinion.

Why the installation costs of the pump sump are higher than those of Baufix is not clear to me at the moment.