Earlier quoted context omitted.
It’s really not that bad. WiX is actually pretty decent, definitely not a “disaster”. It might look more frightening than InstallShield because you don’t get a nice UI that allows you to set up an installer with a few clicks, but I mean, we’re programmers here, surely editing textual configuration files is not an issue? It took me somethong like 30 minutes to replace our old InstallShield installer with WiX.
I gave it a shot for a day recently but found it way harder to use than InstallShield or NSIS. Part of it was probably the broken documentation where half the links just ended in nirvana. But I gave up when I learned you really have to add each single file one-by-one and the documentation even defended this as a feature.
This can "kinda" be worked around with "heat.exe" (don't get me started on naming of tools in the toolchain), but even then you'll need to explicitly specify half a dozen command-line arguments (-ag -dr -cg -srd -scom -sreg -svb6 -sfrag) to make the thing work.