We absolutely love this play pen. Our, now, 9 weeks Shihpoo loves the freedom of the space. We decided to expand it and use all 16 panels and It's perfect for him! He's so territorial of the area now...like its his "room" lol.
We also decided to connect his Crate dog crate to it which actually allowed him to crate train where he only potties in the crate portion.
Overall, this was a great investment!!