this review title is: difficult to engage button and the content is: i bought this for my shih tzu but it was much bigger than i expected the button to engage and disengage the tines is very difficult to push and i do not have the strength in my fingers to engage it i need to use a screwdriver to push the button the bristles are stiff which makes brushing easy and the self cleaning is a charm i am hoping the more i use it the easier the button will become this would be great for larger dogs and for those with strong hands to push that button.there are other information for this review, one is this reviewer did purchase it and the other is 0 people think this review is helpful.