The lawn mowing robot is on – which one do you use and what do you say about it?

Mechanical reel mowers only make sense for small areas. The ground should also be very even and there should be no foreign objects on the lawn. The maintenance effort is also higher than with a sickle mower.

A mechanical reel mower only makes sense for small areas. The ground should also be very even and there should be no foreign objects on the lawn. The maintenance effort is also higher than with a sickle mower.

I saw that you have an electric one. Do you still have a (non) recommendation for a mechanical one for exactly this application area: flat and not a large lawn?

Gardena, Hursqvarna or Fiskars are probably suitable.

I have a Sileno Life 1250 and a City 500. Both with modified blade plates each with 9 fixed C-blades from Testrud at Pfennigpfeiffer.

Both with modified blade discs each having 9 fixed C-blades from Testrud at Pfennigpfeiffer.

Did you build them yourself? 9 blades is pretty extreme :D

I am currently also dealing with the topic of robotic lawn mowers.

The following situation:
The property is 950 sqm on a slope, lawn area about 500-600 sqm, and around the house once (the house is in the middle of the property)
i.e. the robot has to go up the slope past the house, continue mowing behind the house, and then go down the other side again and continue there, the steepest spot about 30 degrees incline.

This leads me so far to Husqvarna 430X or Gardena Sileno+

The property is old and overgrown (there was a gut renovation of the existing house) and we are making small to medium redesigns.
Basically, my plan was, after all the "rough" landscaping work is done, to have the lawn redone (it is currently very uneven and overgrown with a lot of weeds) and at the same time install irrigation and robotic mower.
But since that will probably take another 5+ years, I am now torn about how to deal with the existing lawn. Since we now have some areas that were previously paved as lawn, I have to reseed. I thought, why not just buy the robotic mower now and save the next 5 years of mowing time. Or is it disproportionately much effort to lay the search/boundary wires twice and I should continue mowing with my petrol mower until then?