I have four self made broadband acoustic panels for the low end and decided to treat the mid/high end of my room and I chose studio foam from Auralex for its durability (my friend’s studio foam lasted for a several years and still looks great, no tear and wear at all).
The studio foam are easy to install with adhesive or nail gun, and it really works for the high/mid ends. Although its performance is not that good for the low end with the limitations of material, it still a Best Buy for everyone want to treat the high/mid of their room.