It's nice to have the pallette in case you forget a shortcut. The pallette can change to reveal one group of shortcuts and two groups of Greek letters. There is also a multi-character typing trick to get Greek letters as well. Graphs can be created easily, and stretched to the desired size. Units I had a difficult time learning how to tell the software which system of units I wanted, mainly because my instructor and the program differed on abbreviations for one or two units.
Case is considered, so m is okay for meter.
If you employ MathCad's standard abbreviations for units, you can jump between magnitudes and even systems of measurement, then ask for the result in whatever units you desire. It's important to note that it is quite simple to reassign abbreviations, and a block of such reassignments could be easily pasted at the top of each worksheet. They include formulas ready for pasting into worksheets, along with explanations of how to use them. They are designed to reduce the need for paper references. Check Mathsoft's website for more information.