FormView or custom coding

I have a GridView which will display 25 records at a time.

Currently i have done custom coding for Update and Insert operations.

When clicked on the editbutton (in the gridview), I open that record in a page where i manually bind the fields to textboxes and on click of update button i do the update operation

similarly i have coded for the Add/insert button

Friends Please tell me
1) which is the better way of coding? should i use built in Detailsview or Form view OR should i continue to custom code in the way i have been doing.

2) Does using Details view or Form view increase the overhead of the page. What about the speed?

Regards Sara

What do you mean by custom coding ?? Do you mean exposing data class objs ?