Originally posted by close-enough ...Does anyone use Nik software's Sharpener?
Yes... it, when combined with NIK's other plug-ins to LR4.2, is highly recommended.
NIK offers excellent (free, too) on-line tutorials that will give you a quick boost to get you up and running. I started with Topaz (like it, too), but found NIK's offering better suited to my way of thinking about pp. In fact, now, I find pp fun and look forward to returning to my desktop after a day in the field to see what's there to explore further, then develop. It took about a month of use to mature my work-flow so I rarely spend more than 3 minutes on an image.
The tools in NIK's kit are very powerful. A little bit (no pun intended) goes a long way.
For tons of K-5/7/20D/100D/Q examples, check out my sig links, below. You be the judge...
Cheers...M