My dad and I had a JD435. We traded up to a slightly used JD467 I guess about 6 years ago.
The speed of the the 467 is MUCH better over the 435 from the time that you begin the bale wrap/ejection process. As I recall, the 435 wrap had a single tie twine system? The 467 has the netwrap. The netwrap punches the bale out much quicker with less effort than the 435. I never put a stop watch on the process, but I would guess it ejects the bale in about a third of the time compared to the 435. My dad had some problems with forgetting to disengage the PTO before he ejected the bale on the 435 which busted belts a couple times (I never had a problem with it, but he did). The 467 is all automated. All you do is lift the gate on the baler when the indicator light comes on and it auto ejects the bale. Seems like the 435 makes you back up to eject? (as least it did on ours, we didn't have the bale kicker). I love the more automated, much quicker process of the 467.
The Megawide pickup is nice. Frankly, we never made windrows that were that tough to bale with the 435 because of the worn out rake that we had at the time. Now we have a Rhino 10-wheel rake that makes nice big windrows that the 467 gobbles up with ease.
I've never had any serious problems with the netwrap system. I did have a few times when the netwrap would wrap around a rubber roller and screw-up. The local JD dealer told me to rub some baby powder on that rubber roller at the start of the day each use. Since I've started doing that, I've never missed wrapping a bale.
On the 435, we were a little careful to go slow to start the bale and looked for just the right size of windrow to start the bale with. Seems like a thin windrow was tough to get the bale started. With the 467, I never pay any attention to the bale starting. I just drive ahead and watch the monitor to tell me when to stop for the wrapping to begin.
I love our 467. I expect it will continue to do the job for us for years to come. I like it much better than the 435 we had. For us, as I recall we traded in our older 435 for a slightly used 467 for a net trade difference of about $12,500.