Update 4/11/2013: Here is a way to get the Nik Plugin Collection for $126.65. Use the the coupon code "HDRsoftware15" at this website: hdrguide.com/nik-collection-coupon-code.
There are many professional real estate photographers that use the Nik plugins for Photoshop, Lightroom, Aperture. These are all powerful tools for photo-editing that extend the speed and power of the applications they are used with. Although I haven't used these plugins in the past I've always been very impressed by the live demos at Scott Kelby's seminars.
There are also many that don't use Nik plugins because they have been so expensive. Depending on when and where you purchased them the whole suite could have cost you $500. I always thought the plugins were a bit over priced.
Last year Google bought Nik Software and A few days ago Google announced that it is reducing the prices of the Nik Software plugin suite to $149. Wow, what a deal! I got several emails today from ecstatic real estate photographers that were happy about this huge price drop. Google is also apparently giving existing users a free update to the plugins.
Google has committed to continue to evolve the Nik plugins, and they have already made some improvements to the plugin suite, like a common installer that works on Photoshop, Photoshop Elements, Lightroom and Aperture.
You may want to take a closer look at Nik plugins, I am.