it seems to work better than my basic excel files.
Word of advice - don't apply what you know about Excel when designing database tables. They might look the same, but are two very different animals. If they turn out not to be, you are headed for trouble. If you want suggestions on recommended reading (there is LOTS of it) we have suggestions for beginners.
EDIT
Agree with the filter on/off suggestion. Frequent resetting of a form's recordsource and subsequent requerying is not optimal performance wise, especially if the data is coming across a network. In some cases, you might cause data over-write when you don't intend to. I think we're all assuming the combo box is not bound to any table field too.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.