All user reviews of 5/5 for the Apple Logic Pro 9

There hasn't  been a single compatibility issue so far.  Logic was designed for Mac's of course so it works like a gem on my Macbook.  The Logic manuals are so damn big and they aren't really great for reference in my opinion.  The best bet is to buy some tutorials and sign up to a Forum or google any issues you might have.  This DAW is by far the most simple and amazing DAW I have ever used.  The interface is very well done.  Clips are easy to see and manipulate,  there are tons of view options such as having free floating windows, color customization, excellent automation control, and you can even stretch the plugins to easily view and control them. 
All the typical functions in Logic 9 are extremely accessible.  When you first start off, most of all the basic controls are very easy to find and use.  When you start digging inside to get to the real goodies, it takes a little help to feel really comfortable.  I suggest MacProVideo tutorials, they will jump start you control over this amazing program. 


SUITABILITY/PERFORMANCE

Logic 9 works great.  I only seemed to run into problems when I tried to open Logic 8 files in Logic 9.  Occasionally it would have a problem "syncing Midi" or something like that.  A friend showed me a way to reset your audio drivers in my macbook and after I did that, no problems.  I use a Macbook with 2.2ghz, 4gb ram, and a 320 hdd.  I also use a Presonus Firebox and Firepod.  They seem to work together really good.  One problem I still have is Logic Audio crashes when I run too many midi plugins.  I think this has to do with the limitations of a laptop, not Logic. 
I give Logic 9 a 9 out of 10.  I would give it a 10 if I didn't have to deal with the Logic Audio Crashing deal.

OVERALL OPINION

What I like most about Logic 9 is its extreme ease of use.  I feel like a pro studio engineer when I use this program.  Making crossfades is a piece of cake, writing automation is a breeze and fixing mistakes with the new (and amazing) Flex tool is unbelievable.  You can instantly drag audio sections as if they were midi notes, its really awesome.  The only thing I don't like about Logic 9 is that it is Mac only.  I have a super powerful PC tower but I can only use this sweet program on my macbook, that is until I can come up with $3000 to buy a Mac Pro. 
For $500 (less if you upgrade from a previous version) you get an amazing DAW, a sweet Live music application (mainstage 2) and a huge amount of amazing plugins.  You really can't beat that, its an amazing deal.
Precision and quality of the sound is superb.  I don't think I use this part of it, but I understand that Logic 9 is HD compliant, just like Pro tools. 
I have used Cubase, Ableton and Sonar and Logic 9 easily kicks their butts. 
I would definitely make this choice again.