I have my Burger 650 back now and had it installed for 2 weeks. The original review was on a Reflex 250 a smaller scoot, so I felt I would give an update to that review.
Ease of Install 4/5
4 3M tabs is all it took (included) and was done in ten minutes. I installed it so it was about 2 1/2 inches above the stock windscreen.
If anything the Lip works even better on the Burger than on the Reflex. Before I had a fair amount of helmet buffeting but with the Lip installed I did not notice any at all. I was still able to see over the Lip as I prefer, and it seems to be sturdy into the 80mph + range. i also had a chance to test it in the rain and it worked well. One of the ways I could tell it was truly deflecting the air up over the stock screen was the insect impacts were all near the top of the Lip or under it. I am 6'0 with 30" Inseam BTW
In conclusion I am happy with the Lip and would reccomend it