I have this attached to my puppy's crate and it works beautifully.  He stays in the pen area and is perfectly comfortable.  The gate is a nice option and when I'm home he can jump through the gate opening and into his crate to lie down.  I plan on taking this set up camping or when visiting my with friends who have an exuberant dog so he can have a little down time.  Totally collapsible to a flat form.  The hook that holds the collapsed pen together also doubles as a hook to hold the crate door open.