I dunno if it will make you go "wow" but it will make the amp go "click-click-click" every time you change the volume. The clicking should be very soft though, and you may not hear it anyway while wearing headphones.
For me the Alps standard pot is good enough. I would consider the upgrade if I needed remote volume control, but as it is sitting on my desk I actually prefer to use the knob. I have measured the output of botch channels with pink noise and sine sweeps as a source and the balance in my unit stays within +-0.5dB. I had to resort to the lab approach as listening tests didn't show any discernible differences.
Speaking of balance, I do have one minor gripe: the way the balance control works in my unit. When I turn it to the right, the right channel goes louder, but there's no change in the left. When turning left, it attenuates the right channel but the left remains unchanged. In the end the outcome is the balance shift, but it also impacts the overall volume level. I don't believe it is like that by design, but inspecting the interior failed to unravel any issues with the assembly quality. It's not a big concern as I hardly ever need to touch the balance, but at this price point I'm not too keen to accept anything less than perfect. Can someone please confirm that their unit behaves as expected (i.e. when volume in one channel goes down, it goes up in the other) when using the balance control?