Comment on Adobe Photoshop Lightroom

my only complaint is that on my iMac (2.8 GHz Intel Core 2 Duo, 4 GB 800 MHz DDR2 SDRAM), it can slow down SEVERELY if you make a lot of edits using the tools. but I love the way it keeps track of edits. while it does some things better than photoshop, it's not a replacement, but rather a compliment.