Originally Posted by filmtwit
It has a lot less features then Lighroom, it's slower (memory pig) and well, you're better off using iPhoto
It's true that Aperture 3 does need some horsepower to run it well - you'll likely want a current iMac or Macbook pro to be happy. BUT I far prefer the raw conversion out of aperture compared to lightroom. I also find it much more intuitive to organize, much easier to make selective adjustments, much easier to retouch, much easier to batch edit than LR. It is certainly a professional app and anyone that says it's no better than iPhoto shouldn't be taken seriously.