Needless to say that iPhoto is the most important part of suite since photography is one of the last professional sphere of use Macintosh computers. Many serious photographers, freelancers and even professional studios use iPhoto as main tool for their photo database because it very simple gives ability of fast navigation through huge numbers of photos -simply find the chosen one and export or edit it.
I saw iPhoto since version 3 how it pass through numerous updates and in most cases it was smooth easy update. Because Apple change database structure about every time when new generation of iPhoto program, database rebuilding is used to be a normal procedure during upgrade and even when errors in database appears there were always simple way to repair it with internal iPhoto commands or few simple file manipulations and never, I repeat, NEVER it leads to losing original photos. Lets see whats happened.
If you are Macbook or Macbook Pro user - in most cases you will not get into troubles and new iPhoto will work pretty nice. If you are Mac Pro user or iMac - prepare to serious troubles. You MUST backup your iPhoto library(-s) before this update! In best case you got endless waiting of iPhoto loading its library. Errors during database upgrade is another but not worst case. Both situations solved if you briefly search the Internet. Worst is situation when you find out that all originals (or Masters as it now has a new name) disappeared!! Its a real nightmare (not even close to Halloween) if you not backup your library first. And even if you do and your library as huge as mine it will take our to restore everything back. Strange enough having in mind that now databases upgrading procedures use journaling as a simple and reliable way if something goes wrong during update!
But the reason is simple - now since Apple decided to rename folder "Originals" into "Master" (I wonder why?) it requires to move files from one folder to another and with insufficient permissions it stuck! Just not understand why originals becomes deleted BEFORE moving operation finished....Very lame!
After we pass all the obstacles what we get ? Well, this is the most interesting part. Yes, new features- most of them are doubtful - simple e-mail sending, facebook share etc. Some full screen abilities... Its all good but not for that price! iPhoto now seriously slow even on my 12 core 32 Gig ram Mac pro! It took seconds to move 2000 photos to trash in Iphoto 9 - now I have to wait about a minute for the same operation. No smooth scrolling... Waiting for event list to open... huge delay while loading iPhoto itself etc and so on !! You got the point - after spending so many hours upgrading to new version we got slowdown it freezes our work , so I roll back to iPhoto 9 and happy again watching how fast it is compares to the new one. It cost me money, time and nerves!!Conclusion- I do NOT recommend you upgrading this time! Apple show us its true attitude to customers one more time. Personally I never saw when so many people was so angry and disappointed and cursing Apple after new release! Even release of Vista didn't get such reaction so fast! I see day by day how Apple going down !