Really amazing quality follow focus for the money. It blows every other sub $200 or $300 follow focus out of the water. Its built like a Tank very solid a tad heavy but worth it for the quality arm and gear box. I have been looking for a good Arri FF1 style focus since I used one 3 years ago, and I think this is the best I'v seen. The arm has a nice action to it and the rosettes on the arm really lock it in place far better then anything I'v seen. These solid rosettes solve what I thought was the key week point of Arri FF1 design. There is very little play in the gear itself. What tiny amount is there would have been solved if they had used tighter rosette pattern on the gear and were it attaches to the drive shaft/gear box. Overall the amount of play is hardly even 1 or 2% so it really dose not matter much. The other thing to keep in mind is the grease they use is thick so it provides a very nice smooth pull, but you do need to put a little more muscle into it then you would with some follow focuses. Personally I prefer a thick grease as it helps dampen my pulls better. The gears are the standard Red Rock verity have my own set so have not tested the ones that came with it. Overall Amazed with the price and quality of this FF. If your in the market for a very versatile follow focus like the Arri FF1 but want something a little more heavy duty then this is the prefect fit. Have only used it for 2 months now will report back if i have any future issues.