My Toyota Camry came with a keyless entry keychain, and in the almost-five years I've owned it, I've pressed any of the three (and sometimes four -- whoops that's the alarm) buttons no less than 3000 times.  I would estimate it's more likely double that number.  And by the beard of Zeus, I haven't yet needed to replace the minuscule battery that makes this process possible, nor has the keychain had any issue working, despite the complicated nature of the technology involved (electromagnetic waves flying through the air from my hand to my car's brain, telling it to unlock the door; it's crazy) and the minimal amount of power supplied by the little pancake battery.  This is a credit to the engineers and designers at Toyota for making a product that does what it's supposed to, given its excessive, though expected, usage. 

Meanwhile, the battery in my relatively new laptop at work doesn't last more than 45 minutes, even though it says it'll last for two hours.  The "new" lids on those Coffee Mate coffee creamers always leak, and the flip-up ones on the International Delight bottles always manage to spray liquid directly in my face.  My electric shaver doesn't work while it's charging,, which, odd as it may seem, is exactly when I need it the most.  Many products come in clamshell plastic packaging, which has been proven to be literally impossible to open without self injury. 

My point is this:  When people design products, do they test them out first?  Do they fill the coffee creamer container with coffee creamer, put it in the refrigerator, take it out, and experience the frustration of spritzing sticky liquid everywhere?  I'm an engineer.  I've designed things.  And perhaps my designs haven't been the best, nor have they been used by the general population, but you can bet your ass I'd test out my product before I gave it to a bazillion people. #products