I like the Micra well enough, but it is simply too heavy and clunky for carrying every day in my pocket. The fit and finish falls far short of those of any SAK, including the MiniChamp, my EDC. The Micra would be good if you use scissors very often or for heavy-duty tasks, such as cutting thick twine or cardboard.
On the other hand, if you find pliers to be more handy, then the P4 may be the way you should go. Personally, I find scissors to be more useful. If I need pliers, my Swiss-Tech MicroPlus usually suffices. If not, then I pull out my CyberTool 41, and escalate from there to either my Wave or my SwissTool R/S.