I mean used it not seen it operate or someone showing you what it does). If so what do you think of the program?

1. Have any of you guys used EPDM or PDM in the past (I mean used it not seen it operate or someone showing you what it does). If so what do you think of the program?
2. What issues do you see regarding creating a drawing
3. What issues do you see regarding changing a drawing EO (Engineering Order)
4. What issues do you see on your daily workday?