Now you can cut and slice your mesh into "solid pieces" easily by using Grid Modeler addon.
In latest update of Grid Modeler, it has the functionality to Boolean Slice the mesh by drawn shapes directly. You can conveniently draw shapes on grids with perfect alignment and size, then cut it / slice it easily.
Using this method, cool Sci-fi or hard surface models can be created efficiently. Slicing and move it, bevel it, cut the corner, and done.
When you draw, you can change grid size, enlarge the plane, quick copy the shapes, or even bevel. it has many advanced design and facilities for grid-based drawing.
Besides Boolean cutting and slicing, Grid Modeler is a speed modeling tool for adding new geometries easily. Since you can draw things directly "on top of " existing face, it saves you a lot of time. This workflow is proven very fast and efficient by many users.
Many Grid Modeler users come from 3D modeling tools such as "Sketchup" or other CAD software. If you enjoy the workflow of those tools, you will definitely interested in Grid Modeler.
For more information, you can see the demo on youtube, or visit my website.