Very good, cheap and very sharp

I have this for my Kreissägeblätte Bosch GKS 10.8V Li battery Handkreissäge bought because my used circular saw blade after countless cuts in different materials has become blunt.
Therefore, a replacement had to get back her efizient and uses battery power saws to Könen. The original Bosch or Makita leaves all cost more than 20 euros, these saw blades are cheaper by almost half. Moreover circle saw blades are not widely used in the 85x15 version.
The cutting performance with these saw blades is quite impressive with the original Bosch see leaves. In addition, the battery lasts again significantly more cuts and hard woods and Aststellen ask for this Sögeblätter not a problem. The blade cuts through all types of wood like butter.
I can not judge whether the cutting teeth stay sharp longer.