I have never had a shredder before so I can't compare mine with anything. However, I am most impressed with my Bosch AXT2000HP. It seems able to shred almost anything I put in it - it can't do VERY big branches, but then I don't expect it to. We all have our limits! It is fast and reduces the branches to lovely little pieces about half an inch long, which seem to rot down quickly in the compost bin. One thing that surprised me was the noise, or rather lack of it. Any cat owners out there will know how panicked most cats get at the sound of noisy domestic appliances. Well, my most nervous cat wasn't frightened by the shredder at all. She just tucked herself up about 2 metres away from it and watched it working with great interest. (The other cats wandered off, equally unbothered.) Which shows how quiet it must be!
All in all, I would say that this is a wonderful purchase, well able to cope with anything you might give it to do, and invaluable in a small to medium garden with lots of small tree prunings to dispose of.