I agree, Kathy. I always take reviews, whether really good or really bad, with a grain of salt if they are by a first-time reviewer or someone who is new to the site (whichever site) and has only a couple of reviews posted. It's also usually easy to tell when a negative reviewer has an axe to grind.
I do key-word searches for my personal deal breakers. I look at both official and traveller photos. I read reviews at more than one site, if possible.
I've actually had good luck using Trip Advisor reviews, and I have posted quite a few reviews there, myself. My reviews are never influenced by fear of how I'll be reviewed, either, whether on Air B&B or VRBO. That said, I've had many excellent experiences, and so I've posted a number of glowing reviews, but I feel they're deserved. Mind you, I don't get upset by silly things, like the "king" bed consisting of two twin mattresses, having on-demand water-heaters that need to be switched on, washer/dryer combinations that just spin-dry the clothes, and the like. I know these are common in other countries, and I appreciate the differences. I've adopted a couple of technologies (e.g. on demand water heater, induction stove) for my own home. Sometimes I just laugh and shake my head at the things people complain about.
As someone else mentioned, for rentals, I usually "walk" around the area using Google Street View, and I'm usually successful at finding the exact place, too.
In the 20+ years I've been doing vacation rentals, in addition to hotel stays, I can honestly say that I've never had a really, really bad stay, so my strategies seem to be working for me.