I think you have3 some worthwhile elements here, and I would not be surprised to hear that your customers are happy with it, but I think there is room for improvement and I have some specific design choices that I am questioning.
One of the first things that jumped out at me was the different stroke weights on the stars - that doesn't look attractive to me. And the fact that the middle star is set juuuust a tiny bit above the baseline of the other two stars makes its placement look a little arbitrary.
The Plaza font is also something I'd try to find an alternative to. When I think "Hurrah", I think of a bunch of people cheering "HURRAH!", so, whatever font you land on should have a loud, clear enthusiasm to it; an implied exclamation point. Plaza is elegant and polished, but it doesn't match the word and it has no lowercase. Also, if you blur your eyes a little, that typeface looks like a bar code.
I'd try out some different geometry to the whole thing. Maybe try to have it all visually build up to the top star somehow - see what taking out the horizontal lines looks like.
Sorry if this is a jumble. It's not a bad logo, but if you're really asking for cut throat feedback there you go.
