I brought this off ebay a little while ago - i used it to program two new keys to my Smart 453.
It was so simple and easy to use. This can also do programming other cars as well as doing some fault codes.
It is no longer updating - you would have to add a new subscription to update - but you don't need to update to use - it works perfectly fine without the updating to do the functions on it - so i could do the smart 453 key without update.
The pad is sold with no returns - i've heard of people buying and using and then returning so will not accept returns.