Your mileage may vary
Meaning
(Canada, US, idiomatic, often computing) It may work differently in your situation, or be different in your experience.
The battery lasts a day in my phone, but your mileage may vary.
(Canada, US, idiomatic) Used to express a possible difference in taste: this is just my opinion, your opinion may be different.
I think that red dress looks really good on you, but your mileage may vary, of course.
Synonyms
Examples
Your mileage may vary, and I don’t want to sound dogmatic, but I recommend you unit tests, and see how you get on.
Your mileage may vary, but usually, as Bart Simpson so eloquently put it, “Knife goes in, guts come out.”
Your mileage may vary depending on your ear size.