We had a very nice stay at casa Lubomir. Very nice apartment in walking distance from the city center. I can recommend the apartment :-)
The only thing you have to be aware of is, that the price is variable and depends on how many persons you're subscribing for. In the description it says that you have to pay an additional price (in cash) if you're 2 persons, if you wanna use the whole apartment. But this also applies to 3 or more. Lubomir send me the following (the day before arrival and not included in the description of the apartment):
"The basic price is for two people and for each additional person we charge 20 Euro per night. In case of 3 nights we charge extra 3x20, - EUR. However, you are interested in using both bedrooms (parts) and both bathrooms for only 3 people. As 4 persons are missing, I offer you a supplement instead of 60, - EUR (3x20, - EU) only 40, - EUR. These are the cost of cleaning more rooms and washing more bed linen and towels (our bathrooms are fully equipped as in the hotel). We had two guests recently and everyone wanted their own bedroom and bathroom. For the full luxury of the presidential apartment they also paid extra 40, - Euro"