Last winter, I installed a Cozy Rocket on my airhead BMW using a DMC subframe and 70 degree mounts. They also made an additional rear crossmember I welded in to work with their mounts as well as modify the Cozy front mount. To me, the mounting is solid and easy to adjust with essentially no flexing between the sidecar frame and the bike. At 200 lbs, no additional ballast is needed as I can't pick up the sidecar wheel using the "stand on the left peg, hold onto the handlebars and throw your weight away from the bike" rule of thumb. I did change out the spring over shock on the sidecar with an extra Progressive model from my bike to soften the ride. Now the springing of the sidecar and the bike seem pretty similar and it's adjustable. Before, they could have had a solid bar instead of a shock and it wouldn't have ridden any worse. The passenger compartment is small though I installed the sidecar to be able to ride through the winter here in interior Alaska not to carry a passenger. After studding the tires and adding a silicone heat pad on the oil pan and battery, I used the rig as long as it was above -20F. After fine tuning the alignment and balancing the sidecar wheel (it took 5 oz!) I've been using it daily and put on 5K miles on the rig including quite a few miles on gravel roads. No obvious problems. The welds and overall fit and finish seem fine. The few times I see mention of Cozy within the Hacks forum, it's usually accompanied by something like "Shock , horror *shudder* , he/she used a Cosy". Am I missing something obvious?