You could write your will on a beer coaster and it could be considered valid. But just because it is valid doesn't mean it will have the exact effect you are after or not cause problems for your executor or beneficiaries.
Those DIY will kits look simple but can also lead to trouble unless you are talking about the most simple "all to spouse" Will. Even omitting wording such as "my" before a gift or "as shall survive me" after naming a beneficiary can create issues in your Estate.
A DIY kit is also unable to discuss with you issues such as Family Provisions claims and tax planning issues. It can be easy to inadvertently give a 'contingent' gift to a minor (such as children or grandchildren) which can create significant tax liabilities.
I can only recommend you speak to a professional. For the sake of a couple of hundred $$ you can get peace of mind.
Oh and I am not a solicitor trying to spruik business. Just someone with enough knowledge to recommend people get some advice.
