Something that you will discover is that Tower's descriptions, or recommendations, are not always always correct. For example, their recommendation that trainer planes should have wooden props has been discussed widely here. The concensus was that it's a bad recommendation. However, no matter how many times people tell Tower about it, they cling stubbornly to their recommendation.
Hmm... sell more props maybe.
I have never broken a plastic/nylon/whatever it is prop when there was not more broken things that I was more worried about.