ScoreWatch is only useful if you know A LOT about FICO scores and you are looking for a mortgage and really need to know what your Equifax FICO score is.
The REASONS suggested for score changes are sometimes absurd (wrong), often listed in duplicate -- the software is lacking brains and is rather limited. I find that my readers/clients often misinterpret the reasons provided for score changes.
To find out why the score changed, it's usually necessary to purchase a new report and to review the score factors and the reported data.
But it's nice to get a couple free reports and the discount for future myFICO report purchases.