I would (conditionally) disagree with a couple of their recommendations:
Visit restaurants and eateries located in a busy tourist area. Eateries in busy tourist areas often maintain high standards because they want to keep up a positive reputation for repeat business and customers.
I'm dubious about this based on my experience. Busy tourist areas don't care about repeat business because their clientele are generally only ever passing through. And in many countries I'd be dubious about inspections too. Food hygiene aside anything though, you're more likely to be served tasteless cough and pay through the nose for it. And the food IMO is often poorer quality ingredients and often looks prepared and left to sit for ages waiting for a tourist to buy it. If you only ever eat in busy tourist shops you're going to miss out on half the experience of travel.
Refrain from buying food from street vendors. In many cases, street vendors don't have permits and are not subject to inspection, which can lead to selling food with lower quality and health standards.
I think that this one is over cautious, particularly with the rising western popularity of food trucks. Using common sense like seeing ingredients and how they're prepared, and using the old 'hot or peelable' guide, and only buying from vendors that are very popular with the locals, street vendors sometimes have the best food there is! Some of the best things I've ever eaten have been from street vendors- little chicken satay sticks and peanut sauce in Indonesia, fresh pancakes with caramel and condensed milk in Mexico, sausage in bread in Germany, grilled cheese in USA, little sweets in Egypt, you get the idea.
When we travel we look at tripadvisor and ask where the locals go. In totally unknown places we just look for restaurants that are packed with locals or street vendors/markets with really high turnovers selling stuff hot enough to burn your fingers. That and a discreet handwash with hand sanitizer before eating.
IMO it's mostly just common sense. Follow the tide of locals and you'll 99% be right, both flavour and health wise.
The only time we've ever gotten properly sick o/s was from being served raw chicken in a fancy cafe in Amsterdam. Lucky it was the last day of our holiday and it didn't hit until I got home. It was really bad though, two weeks off work. I emailed the cafe to tell them (my Dr said my infection was a reportable illness), the cafe manager was sincerely apologetic.
