The Budapest Congress Center - in its own a huge building dating back a few decades built with a purpose - to host congresses and such events, as the name of the venue is already telling - situated on Jagello road , not very central but still very accessible.
The reason I've been there last autumn was an unusual event - "An evening with Bruce Dickinson" - the frontman singer of Iron Maiden was touring europe with his latest autobiography, the book titled "What does this button do". (for metalheads the name Bruce Dickinson is an institution, for the others well, most of you probably know who he is). For me the event was a must do!
In terms of the venue - since this is the topic at hand - it is definitely suiting the purpose it was built for. Excellent seating capacity - the seats somehow uncomfortable but arranged very well so you can see the stage in front even if you are a shorter person and you don't got a front row seat. The sound system is very good and the screen where the presentation was displayed is very big, so you have unencumbered view. A wardrobe was in service so coat and bags can be stored until the event is in progress. Restrooms are enough and very clean and there is at least a small bar open to get some refreshment during breaks - or even during the event.
Entering was very fast - well trained people handling admission - exit the same, no queues regardless the fact that the crowd was big.
A great experience with nothing to complain really complain - not the perfect score because of the uncomfortable seats - so if you want to attend an event here, it is a very good venue.