Quality as usual but feel well ...

I have to say I do not get along with these TriZone heads.
In my eyes are much too large to comfortably to brush your teeth. For the same reason it is also very bad in the areas of the posterior molars. This will probably offset the protruding bristles at the top.
Overall, the heads but I remain too clunky.
With the round heads, I have a lot more flexibility.

However, as the quality is very well used and someone else might better cope with it, there are three stars.