Rob Margeton, a top performing Sell Side advisor has incorporated Reps and Warranties Insurance wording in EVERY LOI he handles. As more LOIs are getting delivered and signed among the Searchfunder Community, I would recommend you follow the advice of one of M&A Source's thought leaders.

The LOI stage is place where Sellers have the most leverage and it is here where they can transfer most if not all the transaction related risk to an insurance policy (Sell side RWI for deals under $30M). Having insurance on your deal removes most of the contentious negotiations, and with the higher level of protection, Buyers are open to sharing the cost - making this a win-win proposition. Check out this content link for more information.