I have a suggestion for rtb 4.1.  Remove the star system and replace it with like/dislike.  I don't think the stars work too well.  From what I've seen, people either rate 0/100000000!!!!!! or 10000000000000/10!!!@!!!
And the rest are:
"It's great but I give it 4/5 because nothing is perfect!"
"4/5, it sucks but you tried hard!"
"4/5. Bad add-on, but it's a good idea!"
"4/5. Wow this is great! But it's not second coming of Jesus!"