Years ago, booked two separate awards for a Euro vacation. Opted for the recommended Allianz policy on the outbound tickets, then called and filled them in on the rest of our trip (multi-country, multi-passenger, multi-ticket, etc.).

I want to say the original "fee" was like $35-40 for the insurance on the outbound award ticket (x2 for 2 travelers). For an extra $50 or so, we got coverage for the entire trip including the return flights (booked on a separate award) and some expanded coverage for our mutli-country travels, including rental car coverage of some variety that supplemented anything our CC wouldn't cover.
They also covered any award re-deposit fee's in the event of a qualified cancellation (not an issue for EXP's, but at the time I wasn't). The phone agent was pretty helpful when I called in and explained things well.

Their website (once you get a policy #) is also pretty easy to access and you can add contact info and make some minor adjustments to your policy I believe.

For the $120 or so all in, it was worth the peace of mind for my wife and I during a big Euro vacation. Didn't end up needing it for any sort of claim, but it was pretty easy from what I remember.