I will tell it's problems.
Plot: Four kids, go to an adventure and solving things by music. That's how the episodes go along. Solving with music.
Characters: They will be nice and well behave, if it wasn't for their dimwitted nature. Plus the pilot of the MIG jet fighter is not shown. Why? it's not a problem if they didn't focus on music. Voice acting is great.
Value: Okay, why are they called Einsteins, while they focus on music and not science? And why act like Dora The Exploiter? This show tends to focus more on music, the title is misleading.
Art: It's okay, no problems on this one.
Overall: -1.5. I can improve this show if I could.