Hitachi's M12V is a big beast of a router.  It's not the heaviest around (I think Porter-Cable has that distinction), but I found its combination of weight and power really too much to allow precise handheld operation.  Luckily, the only significant handheld use I had to put it to was to plunge cut the melamine board that I dropped my Woodpeckers PlungeLIFT table insert into.  Hitachi includes a 1/2" straight cutting bit in the package, and I used this to cut out my table.  I bobbled a bit at the end of a couple of the cuts because the momentum of the charging M12V was a bit more than I was prepared for.  And changing bits requires one hand on the wrench, one hand on the spindle lock, and two knees to hold the router -- another reason why the M12V is best used in a table.