Business strategy tip:

You might feel it's not very strategic to say before the negotiations start that you're excited about the product(s).

Of course, it depends on each person and their strategic plans, but, in general, British people are very honest, and if they like the products, they just say that. Don't expect, though, the negotiations will be somewhat easier then. The fact that they like the product(s) doesn't mean they will actually close the contract.