[kevsim]

I've been on both sides of this. I've been in meetings where people from a company I worked for oversold a product (promised features that didn't exist) and I've been in the receiving end as well. It never works out well. At best you'll end up making your team miserable to deliver on the lies you've told, probably delivering a subpar product in the process. In the worst case you'll be called out as a liar by your customer.

Sell your product by making something that delights your customers/users.