Considering that it is designed specifically for the mobile galagy Ace 2 I8160, is of quite wobbly. Ok, the assembly is simple and is keeping well on the bike but I have regards the amount of support it expected better. The holder is designed so that it has a "margin" of about 3 mm, which means that it is quite shaky. For normal roads, it is not so bad but if you are traveling in the area and it is not only on the roads, you have every now and then fear that it fälllt out of the holder.