Yeah I really had no idea what it was. I think the TripExpert number score is enough. That's the number that matters. At least that's what you're telling me, so why muddle that with another number.
The main reason to include the 5 star rating would be if your score was relative to that. For example, an 80 at a 5 star hotel was much better than an 80 at a 3 star hotel. But I don't think that's the case, is it?