Bagger is nice. Mine eats shear pins for lunch. Went through 2 class 5 bolts a mow until I switched to split spring pins. Now I only have to replace the shear pin once every other mow. To be fair, I hit tree litter quite often which "shock loads" the shear pin. It just bends a little at a time and eventually fails.
It is my understanding that the new baggers deal with shock loads much better than mine...belt drive or something. Mine's all gears.
The capacity is pretty good. It fills all three bags to heaping every time...first the one to the left, then the middle, then the right one closest to the impeller. When I can't see daylight through the holes anymore, I know it's time to empty!
It sucks pretty good as long as the grass isn't really wet or clumpy. If you mow every week, it is PERFECT. If you only mow every few weeks and take several inches off at a time, you'll have a slow go of it.
It is great for leaves, but the capacity is a little short, forcing you to take more runs to the compost pile. You can mitigate it by how you suck the leaves up (hit them with the left side of the deck so they pass through all three blades before going through the impeller), but the only real answer is to stay on top of them.
It is a bit of a PITA to take on and off, but it is a VERY stout unit that will last the life of my tractor. What more could I ask?
If you were mowing acres of wide open fields, I'd consider a PTO driven trac-vac or something, but with all the trees I really didn't have much of an option.
All in all, I really like it. Works as promised. Has a few quirks, but it really is a nice unit.