Wood or Leather back

For those who own one of the previous Moto X's. How are the wooden or Leather backs? ie look, feel, and most importantly durability? I was planning on getting a basic black but now I'm intrigued by the leather and wooden options. Any input would be great. All research I've done brings up people's first impressions. I'd like to hear/see how they hold up for a year+.

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