I took a GIS class about 6 years ago. I'm not sure what the software is like now, but at that time it was not the sort of software you can just pick up and start playing with; a full two or three steps back from the sort of windows-comparable intuitiveness we've come to expect.
I've been considering retaking the class just to re-acquaint myself with the software. I've been working a lot with large exports from MLS, massaged and graphed in excel, to show market reactions for my reports. But I've been frustrated by excel's inability deal with the data spatially which is GIS's raison d etere.
As a trainee trying to plot a way forward in a field filled with wage killing AMC's, AVM's, and Hacks, I'm trying to develop a skill set and tool bag that the AVM's and Hack's cant come near, and that a class of clients better than the AMC's will appreciate and pay well for, and I think GIS will be part of that package. I'm even kind of wondering if there may be a market for an appraiser providing GIS services to other appraisers.
My sense of industry, at least the residential side, is that we make very poor use of technology. I'm talking technology that benefit the users in understanding of the appraisal, not that makes our job's quicker. Things like well done, meaningful graphs, diagrams, and imaging. Seems like the URAR has set such a low standard for reporting and the Summary report has allowed appraisers to hide behind the "based on examples in appraisers files..." statement for so long that there's little or no willingness or ability to be through, complete, and articulate in this business.