My choice was made based on recomendations here and other places like the local boat builders. I was sold because it's a light weight, self contained unit, that gives me an excellant view. I have a big melon so it's hard enough to hold it up by itself so the lighter the better for me. I'm sure it's strictly personal...but for me the others I tried seemed more awkward...didn't give as good a view, had hoses and battery packs you needed to put somewhere, and you couldn't flip the shield up to talk.