Just came on to post the same info. Unfortunately your link doesn't work (No idea why DIS won't let you post Three links)
More info here:
Feel At Home is an additional service that lets you use your UK plan allowance or Add-on allowance to call or text the UK, use data in selected destinations abroad and benefit from lower-than-usual roaming rates. This applies to everyone on our network, whatever plan or tariff you have and whether you're using a phone or Mobile Broadband device. If your plan doesn't include call, text or data allowances, we recommend you buy an Add-on to be able to fully enjoy Feel At Home.
You shouldn't need to do anything to benefit from Feel At Home it should all work automatically as soon as you arrive. However if you've previously bought a Euro Internet Pass, we may have blocked your data roaming to stop you being charged unexpectedly. If this is the case, and you find that you can't use the internet when you enter a country, just follow the link in the text we send you to unblock your internet access.
Dont forget, not all older devices will work in all countries. If youre travelling to the USA for example, youll need a quad-band device in order to pick up a local network. All devices we currently sell are quad-band. Click here to check which network frequencies your device works on.
Where Feel At Home applies.
You can currently enjoy Feel At Home in the following destinations:
Australia
Austria
Denmark
Hong Kong
Italy
Indonesia
Macau
Republic of Ireland
Sri Lanka
Sweden
USA.
We are working hard to add more destinations to this list and will let you know as soon as we do.
What Feel At Home covers.
Feel At Home means that you can use your UK plan or Add-on allowances to:
call the UK
text the UK
use data on your phone.
If you have Three-to-Three minutes, youll also be able to use these to call someone else on Three either in the UK or in the same Feel At Home destination as you.
If you run out of your allowances.
If you go over your plan or Add-on allowances, or are using Pay As You Go credit, you'll be charged at roaming rates that are lower than normal. These rates are:
20p per minute to make calls
7p per text
10p per MB.
Its always free to receive calls in a Feel At Home destination. Find out about other roaming rates where you're going.
If you run out of your inclusive allowances, and you don't want to be charged roaming rates, you can now use My3 on your device or on Three.co.uk in Feel At Home countries to buy normal UK Add-ons. Depending on which Add-on you choose, you can get additional allowances of calls, texts and/or data. Just visit mobile.three.co.uk/my3 on your phone, or call us free on +44782333330.
If you have a credit limit or zero spending cap, this will still apply while you're in a Feel At Home destination.
Limitations on Feel At Home.
There are some limitations on Feel At Home.
If you're new to Three and have a new Pay Monthly SIM plan with us, you won't be able to use your SIM abroad for the first 30 days of your contract. If you want to use your phone abroad, you'll need to call us after 30 days to activate international roaming.
You cant use your phone to tether while you're abroad.
If you're on Pay As You Go, depending on your tariff, you may have certain allowances included when you top-up. You can use these as part of Feel At Home. You can also buy Add-ons which give you allowances which can be used as part of Feel At Home. Special roaming rates for calls and texts back to the UK and data use will apply, but is limited to your available credit.
As in any non-UK country, you cant call personal numbers (070), premium rate numbers beginning 09 and directory services numbers beginning 118. However, calls to numbers beginning 08 will be included in your standard allowances, and then charged at 20p per minute if you go over your allowances.
Feel At Home is designed for UK residents who are customers of Three UK and who are visiting other destinations. If you use Feel At Home exclusively for a full calendar month, at least three times in any 12 month period, we reserve the right to suspend international roaming on your account. This means you wouldnt be able to use your Three device abroad. Dont worry, wed let you know before we did this.
Youll be able to stream and connect to VPNs while in a Feel At Home destination but both of these will be slower than they are in the UK.
If your plan or Add-on includes all-you-can-eat data, unlimited texts or more than 3000 minutes, when using Feel At Home youll only be able to use 25GB of data, 5000 texts to the UK or 3000 minutes of calls to the UK in any one month. We reserve the right to suspend our service if you exceed any of these limits for more than any two months within a twelve month period.
You wont be able to change your My3 PIN when you're in a Feel At Home destination.
) hoping that this will put pressure on the other networks to bring in better deals on roaming. I had looked into the orange roaming prepaid bundle add on but it still worked out quite pricey for the limited usage I would have had from it. 
