I have due to the positive review of the Inter Care Brush Heads - zero815 "MN" - buy. His experience, just opposite the ProResults brush heads, I can confirm 100% and can only recommend a Intercare brush heads. The brush again clear a corner better!
The Intercare brush heads I use with my EasyClean Sonic toothbrush.
I bought the brush heads directly at Amazon. They were delivered in original packaging (blister) and not "in the bags" as mentioned in another review.