Ugly, un-Mac-like UI
Many commenters mock the straight Windows-style port as the first ugly Mac app they've seen. Some argue a good port should still follow platform conventions.
Promising but buggy alpha
Testers report empty columns, broken sorting and an empty process tree after installing the privileged helper. The verdict is that it needs more time in the oven.
Sysinternals deserves respect
Defenders say Process Explorer offers far more observability than Activity Monitor and that Sysinternals tools are better than the rest of Windows. They urge people not to dismiss it because Microsoft made it.