They can give you all kind of information if you want to build a house, or buy one of their already built houses. They have houses all over, so you can see if there is a area you are interested in. I think it is best to make an appointment first, so they know you are coming and can prepare a little for you.
I couldn’t agree more with the last 3 comments. We have been renting an expensive apartment with them since over 2 years and besides sending you bills, above and beyond the normal, they just don’t care. This is our third winter with them and every over week the central heating breaks down. You wake up in the morning with 15°C! Well, this could happen everywhere you’d think. The issue is that they know about it, the heater/furnace is ancient and defective. They just don’t fix it, year on year. Since 12 months they were supposed (confirmed by a letter) to do a facade cleaning/painting of the entire building, nothing! I could go on, including they lied to us that the apartment was new as we took it while we learnt later that they had been a previous tenant... they just don’t care!