We have had and used
We have had and used our TF46 4" PTO chipper over the past couple of months. The chipper has worked quite well for us. We have it coupled with a John Deere 4310 with the PTO rated at ~27 HP.
It will take you some time to assemble, take your time and read the directions and you'll be up and running pretty easily within a couple of hours. It will be a bit easier if you have someone to help.
The self-feeding feature is really nice. It does take some practice to figure out the orientation of the branches, mainly when they are not straight. Chip uniformity is good and it works through both hard and soft woods well. The dual flywheel works well and helps keep the chute clear. We have not had issues with the leaves and/or needles clogging the unit. The needles don't really get chipped or broken down they simply pass through while the leaves do have some reduction. Keep in mind this is a chipper not a shredder so don't expect too much with processing bulk amounts of leaves and pine needles.
Workmanship and quality of the unit is good, and we expect that this to be a generational machine/tool for our family.
Kate and the staff were patient, responsive, and super helpful when we were trying to figure out the best chipper for our application.
I would purchase this unit again. Make sure when you are considering the size of the chipper that you give careful thought to the size of the chipper to best match up with your tractor.