Bottom level is 2m80 max height, all other levels are 2m15 (which is doable). Paying by credit card is €1 for the first 24h, more if you stay longer. Visit to Antwerp by public transport. Parking seems to be underutilised most of the time we've stayed here, if you can drive up to the second or third floor there's very little people. We've not tried the toilets, they were closed last time.