Slipcovers For Old Sofa

I was thinking how to give my living a fresh look since few days ago. I could not afford to buy new furniture and fitting. Therefore, I am trying to get a method that does not have to spend much money. Do you think change the sofa slipcovers would be a good idea? I checked online, slipcovers are selling in very cheap price. One set might cost about $19.99 only. Very cheap. I think old sofa with new slipcovers would provide the different look in our living room.