Sammy, it depends upon its worth to you, individually. No simple answer.
Getting another revolving (credit) card will not improve your credit mix.
To app for and get it, it will cost you a hard pull inq, which will hurt for the first year. However, it might increase your CL and thus lower your %util. And it is a prime card, which wont affect your score directly, but might impress a future lender. And does it offer other benefits that are useful to you?
Rewards? No simple yes or no answer.