For some reason I'd never heard of this program before, despite being dead centre of its demographic (I almost always make an intentional stopover in YYZ enroute to LHR and back for the purposes of "breaking up the trip").
While I suspect I know the answer to it, though, am I right in assuming this program is only free for paid lat/J tickets? For example, a *A J award LHR-YUL-YVR wouldn't qualify for a free overnight and I'd be looking at the (admittedly pretty reasonable) $45 charge? Either way, we're certainly going to do this on the next routing, but it would be an added bonus if we could get it via the J award ticket.
And I'll definitely be forwarding this and (strongly) suggesting that my parents look into it for their next trip out here in December...