Good parking costs 4 euros.

Good parking costs 4 euros.
I personally find Halle very good and clear. Only for a toilet corridor you have to plan a little time as felt the toilets are always exactly on the other side of the hall. You can not pay cash in the hall, but you have to buy and recharge an arena card. These can easily be returned after the event and usually quickly and get the pledge back out or just keep them for the next time.