BEIGE  It won't have me leaving Maya any time soon but the sculpting is nice. FIX THE BROKEN SYMMETRY AND YOU MIGHT SELL ME A COPY.  
(Version 302)

AJOE  I've spent the better part of the past 2 months evaluating 3d apps, but modo set the bar so high that in the end it wasn't even a contest.

Beautiful GUI, great stability (Intel), exceptional learning materials and support, and a sensible license (per user, not per computer) made the decision a no-brainer.

It is not cheap and the learning curve is not short, but this is an incredible tool that you won't outgrow.  
(Version 302)

N E P T U N E  I looked for some good not to say best 3D Modeler and I think on Mac there is nothing better right now. I am planning to make some architectural visualizations.

For that kind of work I still have to learn a lot more though.

Thanks to the many videos in the Help section of the program and luxulogys website I could complete my project. And finally mastering modo and therfore the 3D modeling world should be only a matter of time. Btw. I am bloody hell newbie to it :)

Using modo is a lot of fun to me, because you can learn everyday something new.  
(Version 302)

STESOELL  Powerful modelling and rendering tool. The best GUI I've seen in the past (Huhu Autode*k ;).

Friendly community and outstanding support from the developers. Top-notch Luxology TV and weekly modcast.

Grab your trial and see.  
(Version 302)

MARSVIOLET  A powerful but unforgiving 3D program crippled by instability and longstanding bugs, with a customizable but unwieldy modal interface that hinders more than helps, lacks support for standard Mac key bindings such as the Apple key, and in general shows contempt for the Apple Human Interface Guidelines. A wealth of training materials is available online, but the included documentation is simultaneously incomplete and redundant, and the user community is defensive, arrogant and hostile.  
(Version 302)

LLEE  My attempt to download was repeatedly rejected although I successfully completed registration. I was notified that an error had occurred and was encouraged to contact Luxology, but the contact link resulted in what appeared to be a 404 not found error.  
(Version 102)