Transcend or Z1 for travel?

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Hi - I am considering purchasing a machine to be used exclusively for travel (plane and car). My primary considerations are minimum space, light weight and easy set up. I have travelled with the S9, but have also forgotten to pack it, or not taken out of bag on an overnight trip, etc. The Z1 looks interesting, however it is not an "auto" machine. On the other hand, the average pressure of the machine I am using varies between 7 and 8, so this may not be an issue. In researching the forum, seems like more users prefer the Transcend over the Z1. I am leaning towards the Z1 due to its weight and size.

Now that the Z1 has been out a few months, any advice would be appreciated. Thanks!