We've had Lexi for a year now.
The day we brought her home Eric set out a blanket at the end of our bed to be her bed. She would go to it when we told her bed time, but every morning I found her on the carpet in front of it, and twice I found her chewing on it and ripping the material. The second time I caught her I said alright, if you prefer the floor anyway, have it, and I put away the blanket.
One morning in December (so she had lived with us for over 3 months) I woke up to find her in this box:

At the time the blanket was not in it and one of my sweatshirts apparently was. Also, it was not ripped, that came from use.
I thought her choosing that box was really funny and if she wanted it that was fine by me, so we put the chewed-corner blanket in and this was her official adopted bed. Really not quite big enough for her but it was free and she didn't mind--so why not?

Until this weekend. We finally bought her a real doggy bed. (On clearance, at Ross, and black to match our room--sweet)
It had silly zebra print so we turned it inside out, swapped it for the box with her in a different room and then I came and told Lexi, "go to your bed."

She went straight for it because she is smart like that. She spent a few minutes sniffing it all over and then sat very contentedly on it.

This is just the right size, she can actually spread out on it--unlike her box. Also, some genius decided it didn't need a front side so it works even better than expected.

What a happy puppy. =)
And cute. Oh yes.