On the whole, peoples experiences with department store cards are good except when they loose a card.

Can you tell me if i used except and peoples corectly

except is correct. Peoples needs an apostrophe and loose is misspelled.

On the whole, people's experiences with department store cards are good except when they lose a card.

thank you

You're welcome.

Yes, you have used the words "except" and "peoples" correctly in your sentence. The word "except" is used properly to indicate an exclusion or exception to a statement. In this case, you are stating that people's experiences with department store cards are generally good, with the exception of losing a card.

The word "peoples" is used correctly as the plural form of "people." It refers to multiple groups or communities of individuals. In your sentence, you are referring to the experiences of different groups of people with department store cards.