It does what it should. Even if I have attached to it the small telescoping rod, the GoPro does not sink in the water. However, I find the price a bit much. Basically, you could stick a little Styrofoam onto baking. Well, at least there are two back doors while guess one of the HD3 and one for the HD3 +. When sticking I made the mistake too far to fix up that disturbs because something when closing. Otherwise, it has saved my GoPro on the canoe trip.