They coordinate really well with the other shaped framelits. I have used all three shapes, circles, ovals and squares and paired them up with the regular frames. I really like how well they go together!
I have used Warmth and Cheer Dsp, with Cherry Cobbler and Garden Green on all three cards.
On the card on the right, its hard to see here but is so sparkly in real life. I have stamped a plain white sheet of cardstock with the Candy Cane Christmas stamp set and then glittered the whole paper. So I have made my own designer glimmer paper!!