The park itself is great, there are a lot of coasters and big thrill rides. The entry price is very fair.
However, I wouldn't recommended going during vacation or on weekends. It's a big place sure, but the experience is degraded a lot with this many people there.
There are no Corona regulations, so there is no disinfection of the rides anymore and nobody cares to wear a mask. With so many people, it's a little uncomfortable.
The lines are very long. If you do go during vacation (or weekends), go twice. If you want to visit the big popular thrill coasters you will be waiting up to 2 hours. The lines are also incredibly boring, there isn't much theming, instead there is usually just zigzagged railing. This means that you are surrounded by people on all sides while waiting for a lot of rides.
You can buy fast pass options, however the app in which you do that does not load the corresponding page. It's also only really worth it if you pay 50+ € extra per person which will allow you to skip half the queue and spend your time somewhere else while virtually waiting.
The rides are pretty good, albeit often on the shorter side. The waiting to ride time ratio isn't great, but each ride has it's own gimmick and is quite unique and interesting to make up for it. If you get headaches easily, bring medication, because the rides I've tried were extremely rough. Some of them have head coushions, but they don't really help much. "LIMIT" and the Bobbahn are especially guilty of this, it makes the ride very unpleasant.
Smaller attractions are not worth the wait usually, the queues go way beyond their intended start.
In terms of bathrooms and food, there was no problems even on this busy day. You can usually find a toilet without a line somewhere and the lines for the food were very manageable. There are unisex toilets but they are locked
There was a big wasp problem. It was a hot day and there was wasps everywhere. On every trashcan and every food stall, on you and on your food. One was trying to eat my food out of my own mouth, not pleasant.
My advice, pick a time that is not busy. Go when the weather is suboptimal, during the week, etc... and not on vacation.
You can easily spend two days here, and you will have to if it is busy.