I played it for the first few days it went live. I personally felt it was nothing like Zork and didn't even come close to the feeling that it was the same world. I thought about posting it here, but frankly I was so disappointed I didn't even bother.
It's very RMT heavy. You can play for about five minutes a day before you gotta pay.
When you compare it to something like The West or even Estiah, it doesn't hold a candle. Frankly, they should be ashamed for exploiting the Zork name on it.
Join us in The West if you aren't already. It's the first browser game I'm likely to spend a little bit of money on if F13 is still going strong in a few weeks. That damn 150% energy bonus is addictive.