One thing worth noting, is the actual edition of cable cutter people recommend. Shimano and Park Tool have made several different cable cutter models over the years. So when some people praise the Shimano cable cutter and other damn it, they may in fact be talking about two completely cable cutters like the Shimano TL-CT12 Pro or the TL-CT10.

I use the Park Tool CN-10 cable cutter. It is good enough that I don't care for buying another brand of cable cutter. To get a good clean cut of the cable housing, I hold it two-handed, legs apart, like holding a samurai sword, and after a short zen-pause I close my eyes and scream "Haiii!" and press the cable cutter together with everything I got; bits and pieces flies everywhere, but the cutting is nicely sharp and clean.

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Regards