I'm a pretty normal guy - 5'10'' and some what over weight. I've installed foot peg lowering kits on several different BMW's over the years. I tried to do a BBG last weekend and came up 1 hour 15 minutes short due to flooding and road closures around Omaha, Des Moines, St Joe and Kansas City. I was reasonably comfortable on my low seat K1600GTL.
I had read this string before I took off and ordered the Suburban Machinery kit for several reasons. They're a small American company, I've used their products in the past the the price - $189.42 delivered - was far less expensive than Verholen equivalent.
I put them on and road for maybe ten minutes. I am beginning to think that I wish I'd had them last weekend. They do help me get a little more comfortable. I also find, to my surprise, they lower my left foot enough that shifting has become much better in that my foot fits under the pedal better and my shifts are crisper. Small improvements perhaps but with a great bike to begin with - small improvements are good. If you're 6'6" I don't know you'll notice a great improvement but - who knows?
I'm not a very mechanical guy - installation took 10 minutes for the left side and 5 on the right after I was over the learning curve. The kit is a good value, Suburban are great folks and I'd recommend the product if you're in the market to lower your drivers foot rests.
NOW--if I can get someone to come out with Hi-way pegs - Mick-O-Peg, J-Pegs or someone - I'll be set for my BBG retry to the south in September.