They are very stable, the strap down that comes with, is an excellent coupling, we?ve travelled at 110 km speeds, with no slippage. I called Yakima. The only issue I have found. FYI: No need to update the controller, just plug & play ??. Flimsy no sides but sturdy on top, recommend this product! I noticed a difference in voice quality both when I heard people through the headset and when my friends heard me, stating I sounded clearer. While I cant do a real-time A/B comparison between this and previous generations of this series, I did play my usual audio "test" material in a same-day comparison on both receivers and I am very impressed with what I hear from the 1080. with this poncho in the back of my truck. They havent died on me yet, & I generally use them at work all the time about 4 hours or so per day, cant attest to their claimed 7 hr battery life yet but other reviews claim they got 9 hours on %50 so Ill assume it is possible, which is amazing! Soft and cushiony theyre great for wearing around the house and look good enough to take a stroll in.