Vita-Man's comments are right on-point. The Power-Select feature works very well if the ski is not extremely stiff in longitudinal flex and most modern skis are not. They lose much of their "Select" effect if mounted on lifters (and they are not compatible with all lifters} which is maybe why they have been discontinued.
I use the "turn" setting when skiing bumps otherwise I leave them in neutral. It just takes a second to change settings. IMHO, "Select" feature or not, they are still very good bindings. Tyrolia is big in Europe and Japan but not nearly as big in the US.
If the Tyrolia site doesn't have a "dealer locater" feature you might check shops that carry Head skis. They are both part of the same corporate family. As far as price is concerned they are a very good value.