The bathing lake is really nice and offers a stunning view. We went there with our kids and found the offerings to be great. Finding parking is not an issue as there is a car park just across the street, and it is also very affordable at around 2 euros for half a day. In case the place gets crowded, there are plenty of parking spaces available on the street as well.
Once on the beach, you can rent an umbrella and loungers from one of the providers, with 20 euros for 2 loungers together. This allows you to enjoy swimming comfortably. The water is crystal clear, and if you're lucky, you might even be accompanied by a swan while swimming. The restaurant right on the beach is also highly recommended. You don't need to worry about wearing bathing shoes, although the first 4 meters into the water can be a bit rocky. After that, the bottom is normal with black sandy bottom (be careful, it can get hot).
Overall, we highly recommend visiting this place.