[espresso]

I posted my opinion in several posts:

We need to be able to configure ourselves in admin, which devices we want to serve the mobile version to.
This should be based on screen size, os etc.

There must be a link on the mobile version so users can go to the desktop version, without being bombarded by the question.

There must be a link code provided that we can add to the desktop version, allowing users to switch to the mobile version. QTs version solved this by an annoying window along the top asking continuously: " are you sure you want to switch the version"... Well, you can click on don't ask me anymore... But then you can't go back....