Oh yeah. I've been burned a few times.
One heuristic I use is to find out where the item was manufactured. If it's China or some other place where they probably chose because of cost, it's a signal that they may have made other concessions as well. That podcast talked about this a bit. The good trimmer is made in Japan. The crappy ones are "made in a country that is arguably known for some lower quality production methods". I was guessing China, but I really don't know for certain.
That said, China can make some great things as well. For example, millions of iPhones and Macbooks are manufactured in China.