I've used a 9400, 9600, a few Comeds, and now super-C 9800s. The super-C 9800s are by far the best. I really like how easy it is for staff to maneuver the arm around the table. The pictures are top notch. One issue we have run into is that we put pretty significant hours on our machines and do a good amount of kyphoplasty. The machine that has seen the most kypho cases started to have problems with wires breaking between the base unit and the collimator. This leads to collimation issues that can sabotage a case. For example, you try to cone in and the collimator closes entirely and won't reopen. There are multiple redundant wires, but you need a tech to take the thing apart and swap them around. Eventually you run out of wires. This wouldn't be a huge problem if you could unplug the bundle from the x-ray source and swap the whole cable. We can't do that because the screw in cable conduit thing is stuck. Our tech is worried it will break the x-ray glass if he attempts to muscle it open. We have occasional other glitches that require a reset of the machine, but overall we have been very happy with the equipment and service.