I haven’t taken the option myself, but my investment advisor has told me that for uncomplicated situations you can buy a cheap kit to do it yourself. I remember reading on Reddit a while back to avoid people contesting what they get you should also specify in writing who gets what and what they do not get. End a sentence with something like “…and no more”. “To Bobby I leave $25,000 and nothing else. To Becky I leave $10,000 and nothing else. To Harold I leave no amount of money, no amount of estate, or any of my property”.