Wow i just beat this game two days ago. honestly, i gave it a 7/10
1 yes because of the tedious difficulty near the end. mind you i love a good challenge, but trying to keep 30 stars, get the red coins and 5 flowers worlds 4 and 5 are ridiculous to the point they feel like you need devoted time to master. in comparison to SMW2, it's just out of control.
2 though i like the babies, again the need to force you to use each of them to 100 a level i felt was overdone. i felt like i only used mario 20% of the time through out the game
3. the soundtrack is very unimaginative and boring. SMW2 was epic on so many levels, and this was just a let down.
4. non the less i enjoyed the visuals of the game
5 though not horrible, the final battle(s) were not so amazing.
In short, i felt the game tries to expand on smw2, but actually goes overboard in every aspect except for the soundtrack. Here's hoping new yoshis island balances everything out.