Campsite is very well placed for visiting Klagenfurt and for Worthersee: ten minute walk to Universiteestraße to catch 81 bus to station, number 10 bus nearby to get into town, or a forty minute walk along the canal. There's a 50km walk around the lake, or you can get a boat from nearby. Bike hire is available on site. So a good location.
The site itself is a bit tired. We visited in May and it was not particularly busy, but we could imagine that when it is busy it'd be rather tight with some pitches being on the small side. There are quite a few seasonal pitches. The toilets and showers are okay, but could do with freshening up somewhat.
No ACSI discounts, but the out of season price is fair enough for a city site - there is no supplement for larger pitches out of season.
In short - a good location for visiting Klagenfurt, but the site itself could be better.

A pleasant campsite with good public transport connection into the charming capital city. However the grass pitch areas offering more shade than the hard stand pitches, showed neglect with dirty unserviced electicity boxes. The sanitary block is ageing and cleanliness level not so good, but hot water in abundance in showers, and all washing sinks. Didn't use adjacent luxury swimming pool (chargeable) and WiFi (chargeable) was satisfactory. The restaurant was popular although we didn't use it. I would visit here again.

Arrived here in peak season which was a big mistake as the site ressembled a luxury refugee camp with high density camping and comensurate high noise level. Our pitch was tired grass with muddy patches after rainfull and some litter from previous campers. Narrow lanes meant tight manouevring on/off pitches with larger outfits. Our adjacent toilet block closed for cleaning between 10:30 and 12:30 requiring a long walk to other sanitary block. Water taps may be far away from some pitches. The paid for WIFI was too slow to connect with many websites due to user overload in the evenings.I would not go there again.