Qubus Hotel Wroclaw is advertised as a hotel with "air conditioning". It's not. My room held 26-27C (80F) my 5 nights spent on the hotel. The AC setting were well below freezing, but to no avail (windows locked, AC on day and night). I asked for another room, the staff checked it out and couldn't or wouldn't fix it. Then they gave me a noisy fan blowing at the bed instead. This did suppress the noise from the backyard (yeah, I got one of those rooms). Nevertheless, noise and heat doesn't go well with sleep. Unfortunately this ruined all my nights as I barely got any sleep these 5 nights.
Apart from this, the staff seemed knowledgeable and polite. The hotel and room were clean, looks good from the outside. However, the carpeting on our floor were disgusting. The central placement of the hotel is perfect and this is the only thing you look for (in the winter?), you will get your money worth.
Since sleep is important and sleep is the number #1 thing I do at at a hotel, I cannot recommend it. Stay away, pay some extra dollars and get another hotel.
Cheers. Have a nice a trip to Wroclaw. It's a nice place, with nice people and a good atmosphere.