[reznor9]

apparently no one here has any experience with that brand, but they have a moneyback guarantee if it doesnt work, which in most cases says a lot.. if look in google you can find other message fourms where a few people have used these with success.. not sure where you are from(read your post over, so I guess your from the UK) but all reports seem to be from people using it in Europe and the UK... no US reports so far that I can find... but its nice that it doesnt require your to cut your sim card.

something to note is that a lot of the successful reports come from newbies, which does bring to question if the users are legit or just advertising for the company... kind of like you... since this is your first post.