>I've seen a number of admonisions against using
>FormSets, but no good indicator as to when they
>*should* be used.
>
>Does anyone have a good rule of thumb or a technical
>reason that FormSets help improve performance?

I agree with Nancy, when they should be used now is *never*. And don't let the vfp documentation fool you into thinking formsets are required for custom toolbars, they are not required. That was the last really good reason to use them, but is no longer valid...