Ancestry.mx from USA?

I recently let my Ancestry.com subscription lapse because of the cost and a lack of relevant new databases there. I've pretty much tapped out that site over the years.

But Ancestry.mx seems to have transcriptions of Familysearch.com Mexican records that are not transcribed on Familysearch. I checked the price for a subscription at Ancestry.mx, and it is about half what it costs for Ancestry.com.

Has anybody tried and been successful at subscribing to Ancestry.mx from a US-based IP address? Is so, were you able to subscribe with your ID from Ancestry.com?

If Ancestry.mx permits this, I'm ready to give it a go.