I know a successful wireless ISP and basically in his part of the country it's cost prohibitive to get copper, let alone fiber, to his customers.
I have worked with a successful fixed wireless company in the past as well. it is most certainly a good solution as long as it is done correctly. Not really any different than any other solution. Do it right and it works well.
Exactly. It's almost all about the ISP in question, not the technology itself.
And to clarify for the naysayers. The ISP includes the installation.