When Aperture 2.0 was released I was skeptical about the product. Mainly because I'd been on the Lightroom bandwagon for a while. However, for some reason I can't explain I purchased a copy and have been using it more and more. It has some pretty amazing features and the more I use it the more I like it.
Over at digitalmedia.oreilly.com, Derrick Story, the guy that does the Aperture training on Lynda.com, has a screencast that describes one of these amazing features; the custom layout feature of Aperture. This feature is basically a page layout feature that is based on the feature that allows you to create photo books with aperture. That is, you can put your photos in one of the template book layouts, and send it off to a custom book printer. This feature in itself is useful for real estate photographers to create a high quality coffee table book of a high-end property. But the custom layout feature goes farther. It allows you to create your own designs for flyers, brochures and postcards. This isn't a replacement for InDesign but it's a fantastic feature for a $199 photo management application.
If you are a beginning real estate photographer, that uses a Mac, and deciding what to use for photo-editing I would recommend Aperture over Lightroom. The only feature of Lightroom that think is superior to Aperture is Lightroom's ability to create custom slide-shows but very few real estate photographers seem to use this feature. If you work on the Mac the combination of Aperture and PTlens have everything you need for basic real estate photo-editing.