I love this hotel, it was our fourth summer visit (with relatives in Karlovac, I always try to visit when traveling anywhere nearby in Europe--usually from Italy). The hotel is classy, comfortable, with a lovely location right on the Korana River. Restaurant, breakfast buffet are very nice, there are amenities such as an indoor pool, and the staff are very friendly and helpful.
This time, however, the hotel was showing just a bit of age. For some reason the air conditioning is getting noisier yet less effective. It took a long time to get a hot, stuffy room comfortable even as the din of the fan straining to cool it was irritatingly loud. The thermostats they have installed--to save money?--are a huge pain and do not work well. You basically have to ask the front desk to set your room temperature. And ask again, and maybe a third time, because the system is not accurate or sensitive. We had to change rooms once, and with the problems in our second room the staff assistant literally said "I think you should forget about the air conditioning and just open the window." Really, just forget the a/c and admit the humidity and mosquitoes (it is over a river, after all) when paying $ 125 for the most basic room in what is supposed to be a 4-star hotel? This was a step backward, as is the Wifi (that now requires getting a little scrap of paper with a different password for each device).
These small irritants aside, still a lovely stay at a great hotel.