double-edged sword

(noun) a situation that has positive and negative results

Example Sentences:

Living in Vancouver is a double-edged sword. It is a beautiful city, but it is so expensive!

A: Did you hear about the changes they are making to our work contracts?
B: Yes. They’re taking away our vacation time!
A: I know. It’s a double-edged sword, because they’re also increasing our salary.

From the News:

McCain’s campaign of mockery may be a double-edged sword

Media:

Similar idioms:

1. make hay while the sun shines