Capture One has evolved substantially over the last few years and not only does the present version offer the same excellent workflow, colour fidelity and amazing skin-tones that Capture One has always been known for, but there are now image database tools with image management similar to Adobe Lightroom, an incredibly well implemented set of perspective correction tools for architectural work, a superb lens correction module and much more.
In addition, if you are a Fujifilm X-system shooter, using the unique, moiré resistant but “hard-to-demosaic” X-Trans sensor, then Capture One deserves a good, long look too. While Adobe raw conversions from X-Trans sensors have come a long way in the last year, you will still be able to extract far more fine detail with many other raw converters like Capture One Pro, especially in shadow areas.
While there are other programs that offer excellent X-Trans raw conversions, like Iridient Developer and PhotoNinja, neither of these offers a full package that can completely replace Adobe Lightroom like Capture One is able to. In addition, those other programs do not offer anywhere near the same breadth of versatility that Capture One offers, like the aforementioned perspective and lens correction tools, the ability to act as an image database programs etc. In addition, the colour reproduction you get from Capture One is top notch, whether you shoot with a digital back, a digital SLR or a Fujifilm camera.