I used this program for over two years and am happy with it. True, the interface would benefit from a face-lift but, on the other hand, all the updates issued since I registered have been free.
Being that there is no competition (including, pathetically, no competition from Nokia) this choice is a no-brainer.
Like the other reviewer points out, I will give up my 6310i when it disintegrates. Or I will buy a used one instead. It's simply the best phone, beats the living battery life and ruggedness out of any contemporary phone.