This set is very good! The suction cup is very strong. I was able to use it both inside and outside the car while driving at around 55 mph. The chest strap and head strap are also of excellent quality. I love that the headband has a little grip padding to keep it from slipping off your forehead or cap when you're wearing one. Comes with mounting plates in case you need them. The flotation device works as intended. I have used it in an indoor pool and had no problems! In my opinion, this is a complete kit that all GoPro owners need.