Works - but display + operation untimely

I have the radio center (here: device = electrical Gurtwickler.) Get just now
and abeite principle prefer without manual:
the operation should be intuitive - is not really here!
Maybe I should read more detail and I have the manual yet
tried everything, but I think I've overlooked anything essential.

Plus points:
+ Radioed me up in each floor
+ You can see the command reception and read the roller shutter position in%
(Ie know whether open or closed ...)
+ You can form groups and create your own name (via computer / USB, special program)
+ Standard Batteries

Bad points:
- Rather cumbersome device coupling
- No display illumination
- Bad, angle-dependent display - from the side you can see (especially under a lamp.)
and inactive (!!) menu icons and could read almost nothing.
- Scrolling all the way to the top edge is nonsense, they can in principle hardly read
(Also located in the shadow of the display window edge! If you look oblique> so)
Smaller font on full (good) screen would be better
(Example: you want to choose from room ... 1, 2 ... Rooms, Room 3 ... ->
one has to recognize / Decide to wait until the last letter / number is)
- Grouping of device selection: "scroll" to reverse you need 2 hands
Better a full list from which you choose
- PC software is not up to date: nothing of drag and drop part?
Assignment Gerätename-> device number obviously goes only cumbersome via the handset!
Group membership: Well ... why not a device simply by a group
in another draw or add (threaded view)?

First conclusion:
The device does what it obviously is, but the operation is an urgent need of improvement

Proposal to Rademacher:
Androidhandyähnliches device ("full-screen" instead of only predetermined symbols would also facilitate updates)
with operating / Programmierapp; Bring display / menu and especially PC software on a contemporary level