I bought this unit for my Mum (due to arthritis, she has trouble holding a regular handset
to hear ear for any length of time).
She has found the unit extremely easy to use. The volume settings are also very generous, so the unit can be made to be quite loud if necessary.
The display is not huge, and for my Mum, could be a bit bigger, but for anyone with regular
eye-sight, it is fine and clear.
On unpacking the unit, there are a host of attachments for the different power/telephone connections used in different countries. Also, the power/telephone leads that are supplied
must be over 5m (if not a bit more) in length - quite generous.
The unit is so easy to use, I didn't need to consult the manual (I did eventually scan
through it, just to see if I'd missed anything obvious - but there was no real need).
Overall, if fits my Mum's needs really well and I see no reason why it wouldn't
be ideal for an office.