Anyone using Z-Wing Downrigger System?

Is there anybody using this type of downrigger?  It seems better than just a big round hunk of lead.  I was thinking of buying them, but I can't find very much information (reviews) on them.

I wanted to use them on the lake for walleyes, but I am not sure how well they would work with 75-150 feet of line.  Those eyes get spooky so I like to be quite a ways from the boat with the downriggers lines.