I was worried the add-on panels wouldn't line up with my old setup, but the full length connecting rods lock everything tight with no gaps. The molded plastic feels thick and sturdy, not flimsy like some other pens I've tried. My pup has plenty of room to zoom around now.
These panels clicked right into my existing setup with no fuss, and the full-length connecting rods make the whole pen feel rock solid. My dog can’t push them apart no matter how hard she tries.
Bought these two extra panels to give my rabbit more room and the full length connecting rods hold everything really solid, no wobbling when he bumps the walls. The molded plastic wipes clean fast too, which matters more than I expected.