What's Hot: The interface is very pretty and easy to look at for long periods of time. It's easy to collapse panes and panels you're not using to make room for those you are.
Lightroom is quick and responsive, more so than other products in this category. And it's mercifully competent at saving your layout from one session to the next.
The "Develop" mode is what I care most about in Lightroom, and the layout of the controls actually make sense here. The adjustments are on the right, and a handy assortment of customizable presets is on the left, along with a step-by-step history of changes for each photo. You can even take snapshots as you work, allowing you to bookmark your favorite versions, so to speak.
What's Not: Lightroom can be overwhelming at first. Expect to spend an inordinate amount of time collapsing and expanding panels, scrolling the panes, and trying to figure out the logic of the controls themselves. I wish Adobe would take some queues from Photoshop, which has a cleaner, leaner interface that leaves more screen real estate for your work.
My biggest gripe: double-clicking a photo in the Library toggles between the display of multiple thumbnails and the single photo. But neither mode ever consumes more than the tiny central viewer pane; I'd so much rather double-click a photo to enlarge it and make it fill the screen. Right now, the only way to do this is to switch to the "Slideshow" mode, which is decidedly inconvenient.
Also: The controls in the "Develop" mode tend to be inconsistent. For instance, to reduce red chromatic aberration, you move the "Red/Cyan" slider to the left. But to reduce
blue chromatic aberration, you move the "Blue/Yellow" slider to the
right. This means that adjustments are more of a gamble than they ought to be.