I have seen several of the strap-on type, but people on this sight panned them, because they loosen.
I use the strap-on type, because overall, they are simple.
I haven't had one loosen significantly
while on the road, yet
. My Fiber Stream
's widest point is at the floor, because it does not have a belly band. I feel that this minor point contributes to the ease of seeing behind it.
I use the Odyssey
's main mirrors most of the time, The extensions add to the picture; not replace it.