We have booked a New Year's stay at the Atrium Hotel. Hotel is easy to be found on the Domovinskog rata street, has its underground parking (100 kuna/night) and spa (which we had no occasion to try).
Hotel states it's a 5* one, but, honestly, I have stayed in better 4* hotels. From this my "average rating". Under no circumstances the hotel is bad, though, there are some flaws that should be taken care of.
The room is nice and spacious and contains everything you could need during your stay - safe, bathrobe, slippers (even though small enough for girls only). Bathroom is also huge with 2 sinks. Airconditioning is absolutely silent and effective. Staff is really nice, although there is a bit of a language barrier (they are not "perfect" in English), but always willing to help. Overall, hotel is modern and very good looking.
Now to the cons of our stay at the hotel:
First and the biggest issue to mention is breakfast! Breakfast is absolutely poor to any standards of 3* hotels and up I have ever been to, only few choices available with varying quality, coffee is something to avoid (rather order an espresso) and juice is mostly for those who like sweet thing in their glass, no matter what is inside. If you are lucky you can get some cold eggs, if not you have to stick with artificial sausages. You have bread, yoghurt, some fruit, around 4 kinds of salami (1 of them of a good taste), some cheese, butter, jams, some sweets and basically you are done. During our 2 night stay I was not able to understand why they need so many tables for it if it could easily fit on 1 small...
Also there is just one person taking care of the whole breakfast, so don't be surprised, if you come not as the first one and you will have no clean place to sit, as there will be plates & other "mess" from previous guests.
I can hardly understand, why would anyone state that this hotel is in the center...as it is simply not. It's a 15-minute walk to get to the place where the real centre starts (which is, btw, absolutely amazing) not through a beautiful neighbourhood (not bad, either). If you don't mind to take this walk (and back), than the position should not bother you.
There are some other things I feel like to mention:
There is a step from the room to the bathroom - I have not been able to understand what was its purpose...if there is a underfloor heating, it was not working. Also the radiator in the bathroom (the one on which you put towels to dry them) was not working (or we have not understood how to make it work). Having 2 sinks in the bathroom it is very handy, but...when you fully open the door (90 degree), there is a smal stopper on the floor which makes you not open the door more than 90 degrees - useless to mention that the 2nd sink is located right behind the door, so if you enter the bathroom, the door creates some kind of a barrier in accessing the 2nd sink...something that does not create any serious problems, but I just can't understand what was meant by it... To complete the bathroom, there is also a strange lighting system - there are 2 lights in the bathroom, one for toilet and bathtub, one for 2 sinks. You turn on the toilet light on outside of the room when you enter, however the sink light (which is more often used) has to be switched on from inside the bathroom, on the wall between bathtub and sinks - again a small thing, but something that makes absolutely no sense.
Overall, we were not able to turn on or off some of the lights in the room (the entrance one and the one next to the tv in the corner). Checkout is at 12:00 so if you will not make it, the lights will go off and you will not be able to turn them on - just bear this in mind.
I'm probably a bit too picky, but another small thing I did not like was the hotel's web page. In the 21st century it is for me too weak, with very few information about the hotel (3 pictures overall), better explanation how to get there and where is it on the Domovinskog rata (as google maps had problem to locate it, so my GPS with newest maps).
All the other things I have not mentioned (sleep quality, services,...) were simply great!
The hotel was not overpriced, so I would probably think again if to stay or not, but in my opinion it does not stand up to a 5* one.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.