This all depends on your definition of “good enough”. If it functions and that’s all you want then yeah, it’s good enough.
I would suggest:
Clamping the size of the part if you want a minimum size at all times.
Define the Sound instance before the loop, not that it’s a major issue but it’s a bit easier on the eyes.
Running the effect on the client so you’re able to run it every frame, ensuring the smoothest possible experience for the player.
Lerping the size so that sudden changes in the music aren’t as violent/sharp/choppy.
Besides that, it’s decent. At the same time I can’t really provide a good thorough review on it as I don’t know exactly what you’re going for with this, but as far as visualising the loudness of a sound, it works.