A few annoying things:
. Each handset has its own directory
. it is a puzzle to set the No. of its external mail when you are not at France Telecom
. it tells me constantly and erroneously I have messages on my outer box (the one that I can not call him)
. there is a large sticker "compatible with the box", it is true, as is true of all DECT phones, but the catch is a good old outlet not at all compatible with the box: you have an adapter!