I thought I would finally get around to telling you all of my 7Jurock windshield experience. I am 6'-1" with a 32" inseam and got my '07 Burgman (first bike ever) last summer. I use it to commute to work each day - 22 miles each way, 12 of which are no-traffic, 70+ mph freeway. The bike is awesome - best thing I ever did. I have full Olympia jacket/pants suit, plus a great HJC modular helmet. The only 'issue' really was the damn noice on the freeway - what I like to call "The Thunder". It was way louder than opening your windows in a car. I immediately started to look for replacement shield.
From what I could tell, I wanted the Clearview - mainly because of the apparent appeal of the vent. Of course, as you all know, they don't make a model for the 07-09 yet. I was patient. I even contacted them - they are approx. 40 miles from my house here near Denver, CO. They wrote back, saying that yes, they wanted to make a shield, and would appreciate my help in testing, etc.. They told me to wait until 'after the summer rush'. I did. They never wrote back. I saw that another Denver-area rider kinda volunteered her bike to help them, but... as spring approached, there was still no word. I gave up on them.
I was gonna do the GIVI, but after reading all the forum posts, decided to contact 7Jurock. They sounded great, were a bit cheaper than GIVI and used no extra mounting hardware. So I took the plunge. It was great! I ordered on-line, and specified the 30" model (using Clearview's size-gauging web page). Within 2 days of my on-line order, they contacted me telling me that they were going to build my shield within a day or two, and then ship it the next day. For some strange reason, I was feeling 'un-sure' about my decision to order the 30" model (versus the 31"). The next day, with a buddy, we did the whole "50 foot in front of you thing" and boy, it sure seemed like I really needed all the height I could get, i.e., the 31" model. I called 7Jurock and spoke to "Roy" who told me he had "just made my 30 inch shield". I lamented that I really wish I had ordered the bigger size. Roy immediately told me not to worry - that he would re-make me a new 31" and send it out the next day. Amazing. Now *that* is customer service.
I received the new shield a few days later. Mounting it involved simply removing the stock 'bolts' and using them to re-mount the new shield. In other words, their shield came with no additional parts - just the plastic. It was quick and easy. So, the results...
I had read many posts that said that once getting the larger shields you could "ride with a baseball cap on and not have it blow away", or "I can actually hear my engine noice now". Well... the shield now comes up to my nose (mid-nose actually) so I am still not 'looking thru it, but over it. That said, "The Thunder" is down by about 50% -which is great. But is FAR from "silent" or anywhere near quiet. I get tons of airflow. If I wore a baseball cap it WOULD get immediately blown off. I can now hear "some" noice coming from my engine, which is way more than I used to hear, but nothing like what it sounds like when I am at a red light or moving below 15 mph. Bottom line: With near-perfect visual clarity, 5 inches of extra height, several inches of extra width, low-ish price and awesome customer service, I would have to say it has been an excellent choice.
Oh - I was also very concerned about "blow back", or whatever many folks on the forum call it. Many folks said that once you have a "tall" shield, that the air will flow over you (instead of 'in' to you) and then "come back down and around" and actually 'push' you in the lower back. They go on to tell you that you have to 'de-pressurize' your 'bubble' by venting the shield - allowing air and pressure to come in the front, so as to defeat the pressure from the back. I was "this close" to ordering a pair of Snap Vents when I ordered the shield. But I didn't and I'm glad. I get 'tons' of airflow 'in' to my body - and NO perceptible back pressure. I am not 'doubting' or 'contesting' the other posters here, but in my own case, it did not occur.
I hope this helps future decisions. Good luck.