Overrated/Underrated parts

Are there any parts that you think are wrongly viewed as bad(or good) based off of experiences with the parts in battle? I have one. And it's one that has spawned a lot of controversy in Beyblading. It's(yep, you guessed it) T125. So what parts do you think are under/overvalued? Btw please inform me if this should be move/closed.
This doesn't need a thread...
We have plenty of threads in the Customizations Forum that discuss the value of parts, including odd or rarely used ones.