We find exactly the opposite to be true. If you were to go to an unknown area, would you want a map of the area? Well that is exactly what the LOI is: a map of the major deal points. In today's busy world it is important to be sure two parties are going down the same road and in the same direction before spending too much time working out all the details of a transaction.
Major terms that should be included in a letter of intent, however, include the total price to be paid, including the down payment and the installment payments; a description of assets or stock to be sold; tax allocation of the price among fixed assets, goodwill, non_compete covenants, and consulting fees; and target dates for contract signing and closing. Of all of these components, price and payment terms are easily the most important elements of the letter.