Very nice! One area to watch is around and below the gate. If you can lower the gate just a bit so that the gap is no more than 1" to 1 1/2", and at the same time twist the gate hinges so that the gap on each side of the gate is even and less than 1 1/2", you'll have a bit better security. If you have snakes, mice or chipmunks, fastening a board across the bottom of the gate opening on the side opposite the direction of swing will help keep small animals from creeping in.
I use kennel panels as well. They are certainly fast to set up and easily reconfigurable.