So, Toggle SIM arrived and it is in the phone, and I have registered for a local USA number using their website. US number is assigned. However, I am a bit disappointed with whatever the rate is likely to be as I have had 3 different variations:

From the website:
Landline/mobile 3p/min, SMS 7p/sms, data 15p/mb
On the Register local number page:
Landline/mobile 3p/min, SMS 9p/sms, data 15p/mb
On the Welcome text:
Landline/mobile 9p/min, SMS 7p/sms, data 15p/mb
On the pamphlet they send (and which I just bothered to read!):
Landline/mobile 3p/min, SMS 7p/sms, data 15p/mb

I don't like discrepancies like this as it just seems amateurish. Unless I am misunderstanding something of course.

Apart from that, the rest of the process is pretty good thus far.