I am a Windows person and dislike Macs so my views are biased, but we do use Macs at work alongside PCs and a PC based network.
Professionally speaking, Macs on a PC based network are not up to the task. They are uncooperative out of the box and tweaking them to work (particularly wireless networking on powerbooks) generally requires configuring the network to not use encryption, ie just plain text - so in short, Macs on a PC based network generally requires the network to be unsecure. OSX is completely incompatible with Active Directory (whereas OS9 was!).
Silly off topic networking issues aside, my experience with Macs in general use (which includes very old G3s up to high powered G5s), is that they are slow, glitchy and when doing anything remotely network or internet related (mostly in the Finder and some System Panel apps) completely unresponsive. My experience is with OS 10.3.8, as 10.3.9 and 10.4 break most of the programs we use at work. But there have been too many times where for no reason at all an app becomes unresponsive or stalls with the rainbow pointer for an unreasable amount of time - and depending on the program a force quit will render the rest of the OS unstable until a reboot.
Professionally speaking, Macs on a PC based network are not up to the task. They are uncooperative out of the box and tweaking them to work (particularly wireless networking on powerbooks) generally requires configuring the network to not use encryption, ie just plain text - so in short, Macs on a PC based network generally requires the network to be unsecure. OSX is completely incompatible with Active Directory (whereas OS9 was!).
Silly off topic networking issues aside, my experience with Macs in general use (which includes very old G3s up to high powered G5s), is that they are slow, glitchy and when doing anything remotely network or internet related (mostly in the Finder and some System Panel apps) completely unresponsive. My experience is with OS 10.3.8, as 10.3.9 and 10.4 break most of the programs we use at work. But there have been too many times where for no reason at all an app becomes unresponsive or stalls with the rainbow pointer for an unreasable amount of time - and depending on the program a force quit will render the rest of the OS unstable until a reboot.