I've bought a couple of dozen to try for my boys (40-45# & 50-55#), and they are ok. Mine weren't weight matched at all, but spine was acceptable. They seem to straighten easy and stain up well. However I did find them to be very light and almost fragile compared to the Douglas Fir we normally use. In fairness though, me and my boys are pretty hard on arrows, we do a lot of roving, shooting sticks, old sheep and cow pooh 😁, grass, hard angle shots etc. We found a glancing shot would break the German Spruce shaft at the point almost 100% of the time. Hard ground was very detrimental to them too. They would probably be fine in just target foam or similar, but unfortunately they are not for me. Price is good if they work for you though.
Best
Lex