I like it, it works and I use it everyday, so that's all that matters to me.
Positive Product Points
Lets you get personal with your coffee. Why put your beans in a machine? It's good for camping, too.
Negative Product Points
Some folks might think it's too much trouble, but they're just lazy. Only grinds enough coffee for 4 cups at a a time, but I only brew two. BFD. Takes up a lot of room in my backpack, though.
I picked up an older Zass from eBay for half of what a new one costs, and I'll never use a machine again. I have it set on the coarsest grind, and it's perfect for my Braun Aromaster 4-cup brew-wonder. So what if you hafta crank it by hand? I like stuff like that. The old ways are better. This thing isn't for folks who measure the grind with calipers and load their portafilters using a powder trickler.
And your fancy electric grinding machine doesn't work out in the middle of nowhere. What are you gonna do when the power goes out, beat your beans with a hammer?
It was ebay...what can I say? Paid a good price, I got it. 'nuff said.