Yes!!! We are very, very responsible with our cards. Credit cards are not the problem...irresponsible users of them are. Of course, I totally applaud people who refuse to even get a credit card because they know it would be trouble for them...
Yes. We use a cashback rewards card and charge almost everything (anything we can) on it. Then we pay it off in full each month. This way, we never pay a dime in interest and we make thousands of dollars on the cashback money.