meaning and usage of "mind you"

I often come across this expression and according to dictionaries I've looked up, it can be used in several ways such as to:

1. introduce something that should be taken into consideration
2. add something to what you have just said, especially something that makes it less strong
3. draw attention to an important fact that is important to a statement

but how do you use the expression in a sentence/conversation?

Solution 1:

I think of "mind you" as meaning something very like "on the other hand". It introduces a new idea related to the main topic, often a contradiction or counter-example.

Teenagers today are terribly rude. Mind you, I was probably just as bad when I was that age.

Solution 2:

I believe it would be a little bit more appropriate if considered as "in addition". E.g.:

She is quite fancy, but mind you, she has got a lot of money to afford it.