I ordered my CalSci windshield for my 1150 GS will little worry because I talked to the owner before hand and he told me that if I wasn't happy with the item I could return it, but it would need to be in new condition. I was very careful installing it, you can bet. The windshield came packed with plenty of bubble wrap and the shield was in a soft cloth sleeve. Included was a bag with the screws, washers (one extra), instructions, and the mounting braces. With this was a rolled soft cloth and a small bottle of windshield cleaner. Nice touch. Someone in another thread measured the thickness but from the feel of it, the windshield is not flimsy at all. It installed with no trouble, or prying. It was a good fit. The sun was getting low and I wanted to get on the freeway to see if this thing would pass my +80 mph buffeting test. I live in L.A. and this weekend we're getting hit with our annual Santa Anna winds. That would be a problem getting a clean test, but I was hoping I could get a break from them long enough. On the street +40 mph it's perfect. No shake, no vibration in idle or any speed. It's mounting is solid. Once on the freeway I had to deal with crosswinds and it was frustrating to get a sense of wind noise, etc. After a few miles I turned around. This time the wind decided to find someone else to piss off and I got a few miles of decent riding. Let me say here that because I didn't get more than a few miles to try this out I want to test it again after the winds are gone before I can give you the final word on this item. Anyway, back on the freeway... I notice I'm not getting pushed from the side and lay on the throttle. I can see that my speed is getting higher and higher and I'm waiting for that buffeting feeling like I'm losing a pillow fight with Andre the Giant... but it doesn't come. I look down at the speedo and I'm coming to 80, then pass 80 and still nothing. I can feel air on my lower chest, but not pushing. More like circulating. By then the cross wind had kicked up again. Crap! So, initial judgment on the windshield: It works. It doesn't need winglets. It's mounted solidly and I didn't see any flexing or movement of it at high speeds. As for wind noise, I can't say yet. I need a day without cross winds. I'll do a follow up some time this week and give everyone my final judgment.