I picked up one of these recently taking advantage of the deep reductions now the newer unit is out and the out of box experience has been painful. It was shipped with firmware 1.08 and the application store had the 2.01 app.
Needless to say it was flakey to say the least, it would lose connectivity very frequently, and I seemed to need to switch off the unit, disconnect it and reconnect before switching on again to reestablish connection.
The app showed that 1.09 firmware (not 1.08) was available so I installed that, but there was no improvement other than I could now charge the phone through the Flir one.
I checked again immediately after installing 1.09 and it showed 1.11 was available so I tried to install that but it said that I needed more than 50% battery, which made no sense as both phone and Flir were showing fully charged.
I tried resetting with the pin hole button held in for 30s but it didn't make any difference.
In the end I let the battery run down on the Flir completely by leaving it on Video (and reconnecting as necessary), recharged it, and it finally allowed the 1.11 firmware to be uploaded.
It's far far better now, but it's taken about five days to get it to work reasonably well.
In use, for showing up board hot spots, it's pretty good except that there is parallax with the MSX augmentation, but you can work around that easily enough.
Once it's working, at £129 for me the technology had finally approached a reasonable price point.