LegalZoom is a document preparation service. A company like LegalZoom will do a good job assisting you in one thing, and one thing only: getting you the documents you need in order to incorporate. But the devil is in the details. Purchasing LegalZoom's services is not equivalent to receiving legal advice, so speak with an attorney if you need the services that only an attorney can provide. If you've already received legal counsel on how to incorporate, you might also be able to find less expensive outlets for receiving those common documents.
Creating a MAP will take no more than an hour of your time every month and will keep the lines of communication open, ensuring relationships with investors remain strong, and ultimately helping early-stage startups succeed.