LiveCycle has a good user interface and has developed an easy way to create fillable .pdf forms. Users can create a variety of field types and user input fields.
Room for Improvement:
Help menu is a bit difficult to navigate. When using a lot of field, the input can lag a bit.
Assigning Tab orders, even with auto-assign, can be a bit cumbersome
Still a good product, however html vendors are creating new products each day to compete.