I always find reviews of terrible hotels remarkably addictive.
I stayed in an absolute HOVEL in Turkey many years ago (Sun Gezgin, Marmaris in case you're wondering). The missus booked it up as a cheap last-minute jobbie. Absolutely horrific. I've not checked it for many a year, but the Trip...
???
I've always found Trip Advisor very informative and pretty comprehensive on every aspect of when I'm going. There's almost too much on there, I can end up spending hours trawling through the reviews of everything about the hotel and resort.