Meaning of メリット in Japanese

There are a few disadvantages to it.

At the meeting I pointed out the plan's merit.

It has too many disadvantages.

In other words, the merits, etc. of making detours are the consideration of the attitudes of the landowners whose property the line would cross, the convenience of other towns and villages, as well as connection with other railway lines.

But in spite of the merits of being single, they do want to get married some day.