This is a great space to keep our new puppy contained, but with room to move and play. We had something similar years ago but it didn’t have the door so you had to lift the puppy over the side, or if you wanted her to be able to come and go for part of the day, you had to disassemble the corner of the pen. The door in this pen is AWESOME. You can easily get the puppy in and out and have the option to leave the door open for part of the day if you ant to. Glad we found this pen.