Hi Eka, and welcome to Piano World!
I'm no authority on pianos, and I'm certainly no pianist; a backwoods, hillbilly piano player wannabe, maybe.
That said, I owned a Petrof 46" studio upright piano (P115/118?) from the early 2000s for a year or two, and it was the best quality upright piano I've owned (and I've owned a few at different times; some at the same time). It was a very well made piano, with the coveted Renner action. It was a very well made piano with a rich, mellow European tone. The feel of the action was good as well; not too heavy and not too light.
However, as good as it was, it didn't take me very long to realize that the piano was well suited for classical music and not so much boogie-woogie and blues.
Not sure this is the kind of info you were looking for, but the Petrof upright I owned was a very nice piano, just not suited well enough for my favorite genres of music.
If you like classical music and a mellowish, European sounding tone, it might be just what you are looking for.
Before purchase, it would be a good idea to have a qualified piano tech inspect it for you.
Here is a pic of the Petrof I owned for a while...
Hope this helps and good luck!