I used to have a slip covers on our old couches. The one thing I liked about them was that they were easy to take off and toss in the washing machine, you can't do that with the regular couch.

The thing I didn't like about them is they like to "ride up" and they become untucked easily. One thing that helped us greatly was to get a shower curtain rod and put it in couch (tucked under the cushions) to better hold the cover into place.

I'm thinking about making some for the couches we have now. The color of the couches no longer look right in the new house, they need a makeover. They are the most comfortable couches and they're only a few years old so I'm not ready to completely replace them. I want to do it myself so I can recover each of the cushions and pillows individually. I'll make a slip cover to go under the cushions.

To make them you'll probably need (and want) someone to halp you pin it together before you cut and sew it. Lay the materal in the couch how you want it, only with the back of materal facing out. You can then pin it together on the couch, then cut and sew. Turn it right-side-out and slip it on.