It doesn't neccesarrily update your score weekly. It updates your score when it meets a qualifying change.
Technically it could update multiple times in one day or not at all for months.
I find it to be well worth it for me because the alerts let me know when there is a change that might make it worth my money to buy my score. Before I had it I was wasting a lot of money buying the scores and reports here only to find that nothing had changed and I had bought a duplicate score/report to the one I already had.
You might also want to look into TrueCredit. It doesn't give you a FICO score (It uses FAKO) But you can update your report once a day and watch for changes. This is very helpfull if you are in the repair process and have been mailing DV letters or GW letters.
