I am also using several to hang dry erase markers up with. I definitely wouldnt get on the freeway or above 45 mph with anything important on the roof. )As for a stand, I think the Atlantic PN77305018 is the best you can get for Vizio speakers. The one thing I don?t like about the design is that the switch/knob labelling is very faint and hard to read (see images). Ive used every SwiMP3 model Finis has come out with since the beginning. No need for any other shoe all summer except water shoes. They don?t work anymore for me, really badly made and shippers material. This thing is brilliant, Ive got an S9+ and it holds it perfectly making sure it stays right where I want and need it. 10/10 Highly recommend! They were delivered in good time and well packaged.