It’s just ok. It fits the widest part of the toilet which is good- not all of them do. But the toilet lid does not open all the way back bc the shelf sticks too far out. Also, it does not feel sturdy but does come with brackets to attach to the wall. 
HOWEVER-  if you have baseboard and quarter round on the wall, this will prevent the shelf to fit flat against the wall, so there is no way to attach the shelves to the wall. 
Basically, it’s a temporary solution to add storage to a tiny bathroom but will keep looking for something better.