I loved the course, but your mileage may vary.
your mileage may vary
idiomIt may work differently in your situation, or be different in your experience.
Origin
disputed originThe United States Environmental Protection Agency requires all new vehicles to undergo a set of standard emissions tests which simulate city and highway driving. Part of the test measures estimated city and highway gas (petrol) mileage estimates. Since no test can exactly simulate all driving habits and conditions, the actual gas mileage of each vehicle will vary. As a result, when these estimated mileage claims from automobile manufacturers appear in advertisements, they are almost always accompanied with the standard disclaimer “your mileage may vary”.
This diet worked wonders for me, though your mileage may vary depending on your metabolism.
The technique had transformed her productivity, yet she cautioned her colleagues that their mileage might vary given the differences in team structure.