I use this pen to contain my chi-weenie puppy at home for short periods when we can't take her with us.  She hates a crate and this pen works perfectly.  It gives her a larger area to move around in than a crate does.  We keep it in the garage and simply set it up (which is very easy to do) and in she goes.  She is happy and we are thrilled that she is safe and sound in our absence.