One feature I would recommend having in your spreadsheet is an integrated matched betting calculator.
My advice would be to keep it simple, clean and orgainised, which is the point of spreadsheets in the first place. When choosing a matched betting spreadsheet to use or when you are creating one yourself, it really depends on what functions you would like it to do. However, some people prefer them as they can customise them easier to suit their matched betting habits and how they wish to record their funds. Matched betting spreadsheets aren't really necessary with many matched betting sites having built in profit and bet tracking functionalities.