Overall I like them so far.
[I got these after two tooth philips heads (from a six pack) had bristles that fell out while I was brushing. They were both fresh out of the box.]
It's taken about a week to start to get used to the texture of the bamboo. The bristles are really nice and very gentle on my receding gums!
The first one, that I'm currently using, takes a bit of force to put on and take off of the body. This makes me worry a bit how it will affect body of the toothbrush in the long run.
I will however be recommending this to others, especially since they are waaaay more affordable than phillips heads, and don't seem to fall apart with their intended use!

J'ai acheté des têtes de remplacement en bamboo et ça marche bien avec ma Sonicare C2, c'est meilleur pour l'environnement et ça nettoye bien les dents👍

Excellent

J'ai acheté pour ma petite fille et elle trouve que les brins ne sont pas assez raides et que le contour en bois de la brosse blesse sa bouche. Le contour et les brins du modèle originale sont légèrement ondulés. Merci.

These bamboo brush bristles are so soft and clean more effective than my original Philips deep clean version of brush :)! Will definitely re-order!