Good organisation, you get all the information via WhatsApp and the guide was easy to find on site. The building is really impressive and you definitely need to do a Parlament Tour if you are in Budapest.
Unfortunately, there were a lot of people at the same time. In my case, there was an English and a German group and we all walked together through the building. The English tour was operated by a guide and our German tour was only available via an audio guide. The English guide was always a bit faster with his explanation than our audio guide and that made the situation a little confusing for me. Our group always had to wait till the end of the audio explanation while the other group walked onwards.