Read the review. Here are my initial thoughts...
Provide specific examples of what the odds boosts are. You mention them several times and rate them 5* but there are no examples of what they are reduced to exactly and for what sports etc. In order for these to be rated 5* I would think they would be significant and offered regularly?
Also, it's not clear what exactly the rollover is for the bonus. You say something is released every $25 but not how much.