New comment as disappointed.

After 5 months of use, I return to my comment, praise out.
The unit will not hold a charge, barely an hour after 24 hours of battery life on the charger.
I replaced the original battery (550 mAh) by more powerful (850 mAh) the result is bad. Also I always reprogram the date and time.
My Gigaset A58H dating 6 years do not pose this kind of problem.
Conclusion: disappointed with the new Gigaset opus.