For non-USA types, Keyboard magazine is one of the oldest and most respected magazines devoted to synths and keyboards.
Aiken summed up his review:
I have an embarrassing number of great synthesizers on my hard drive. But I'm sure Zebra 2 is going to turn into a mainstay. The sounds are amazing, and programming new ones is just plain fun. Short of Native Instruments Reaktor, which costs a lot more money (and has a steeper learning curve if you want to design your own signal flow), Zebra is the best modular soft synth I've seen yet. Even without the free reverb plug-in, it would be an easy choice for a Key Buy.

