The SF Bay Area is officially "semi arid". Our humidity ranges from 40-50% most of the year.  I own a Rodriguez e Hijos Model FF Sabicas flamenco with a high quality case.  Rodriguez states 65-80% humidity is optimal.  This device alone is inadequate for the Bay Area with 55% humidity achieved inside my guitar case as measured by a hygrometer in various placements throughout the case.  Maybe it would be better in a high humidity area like New Orleans.  But I have to supplement with multiple humidifiers.  I can only imagine that in Arizona you would need the "desert rigging" version.  My other complaint is that it tweaks the strings when I close the case.  No problems have occurred yet, but I don't like the idea of pushing the strings into the sound hole when the case is closed.  Like I said, it works okay, but needs supplemenation in the SF Bay Area climate.
The SF Bay Area is officially "semi arid". Our humidity ranges from 40-50% most of the year. I own a Rodriguez e Hijos Model FF Sabicas flamenco with a high quality case. Rodriguez states 65-80% humidity is optimal. This device alone is inadequate for the Bay Area with 55% humidity achieved inside my guitar case as measured by a hygrometer in various placements throughout the case. Maybe it would be better in a high humidity area like New Orleans. But I have to supplement with multiple humidifiers. I can only imagine that in Arizona you would need the "desert rigging" version. My other complaint is that it tweaks the strings when I close the case. No problems have occurred yet, but I don't like the idea of pushing the strings into the sound hole when the case is closed. Like I said, it works okay, but needs supplemenation in the SF Bay Area climate.