Keep in mind that I already own a Sachtler 30 II with Ransford legs. If you have a good sized crew than the 18 Lbs head and the 15 Lbs legs wont bother you. For my personal use- when I was by myself the weight would wear on me quickly.
The 9903 is light weight. The entire thing can't weigh much more than 10 Lbs.
1. It doesn't have a counter balance. If you tilt up or down more than 45 degrees and let it go, it will continue to sink in that direction. The sachtler I can set the counter balance to come back up to a neutral position. Salution, Lock the 9903 before letting it go and walking away from it.
2. It handles the weight very well. I panned and tilted very smoothly with no resistance set. I cant set it to a 1 resistance give it a spin and watch it rotate five times like the sachtler, nor when I increase the resistance the 9903 gets a little bumpy. As long as the resistance is open it pans and tilts very smoothly, I was happy with that.
3. I extended the tripod before mounting the head, and practically hung all 210 Lbs of my self on it- no give. I was pleased with that. I also felt comfortable leaving the camera un-attended on the tripod after locking it. I wouldn't recommend getting this solution if you want to rent it out, but for convenience and personal use- I would have no problem using it for locked off shots, or smooth pans-
Please feel free to ask any other questions or of any details I may have left out.