Hi
I was recently on a low budget film in Indonesia for the last two months and my QRX100 gave up the fight on one extremely hot day - sure, the location was as hostile as I'd ever been in (an active volcano in easter Java), plus the unit was sitting on top of an even hotter Alexa, which coincidentally never gave up, despite the extraordinary volcanic ash/dust storms.
I only found out the next day when the data wrangler told me that there was intermittant and then no sound recorded to the camera... slight annoying but no real issue as I was using the 788T as the main recorder, and man, did that thing get hot - too hot to touch for too long!
But since I've had the Zaxcom kit that's been the only failure I've had... great units, very well built, but hate the menu structure, I'm no astronaut, but I find it a bit overwhelming!
Rgd's
Andrew