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If your only using 1 set of bindings there is not actually any need to get them.
A couple of seasons ago I just had 1 set of bindings for my 3 pairs of skis. Its easy to just swap the bindings over and so long as you have any tech skill the holes will b fine. I have never suffered any form of pull out on the 3 pairs and Im still using 2 of the pairs to this day.
So overall they could be good option but if your only using one set of bindings you dont need them.