I had problems using this as the activation code rendered void. My Sat Nav is much older than 90 days. The vendor should have made it clear that it is only supposed to be used with fairly recently purchased Sat Navs. After numerous phone calls and Emails to TomTom support I have finally managed to get updated maps.
Seeing the advantage of not having to worry about updating the TomTom's maps for 2 years i bought this nice cheap pre-paid card. I see that the description says that the card is for "new TomTom devices" so i think: "Great. Mine is a Go 1000. One of the newest ones out there". However no matter how old your TomTom is, if it is older than 90 days from first use then this card is not for you and will be rejected. Bit disappointed that the product decription failed to mention this 90 day limit.