I've found the Q to be very durable overall, surviving at least 3x collapses / falls with my various poles for aerial photography.
One fall cracked the back screen (and nearly my a ankle) but it still works fine. Another time one "kissed" a saltwater tidal pool in a similar way.
A Kayak Aerial Photography Method – a behind (and above) the scenes look! | kayakfari ( kayak .. far .. i )
A few years ago I acquired a 'non-working' Q off eBay for $10 delivered for parts.
This one also had a fall and cracked glass screen, but the lcd was also toast.
Out of curiosity I connected this Q to a TV via A/V cables and determined that it worked fine.
Here's my story on taking it all apart and repairing it, still works fine!
The Q is actually easy to work on, although the tiny memory battery can go bad over time and I believe is soldered in.
Pentax Q disassembly and LCD repair – replacement operation. | kayakfari ( kayak .. far .. i )