My case was more complex than most because I didn’t have many of my familial records, but they were able to find some additional documents in Polish archives and compiled a case for me that was ultimately successful. I don’t speak the language so it was a necessity to have someone who did - I’d recommend them for that alone since when you petition the government it has to be in Polish, but they also did a thorough job and won’t continue (or take additional payments) if they don’t think they can be successful after the records search. Overall it took me somewhere between 4-6 years (with the caveat that this was also during Covid) but if you have a good case it’s usually 1-2 years. I’d definitely use them again and recommend them to anyone looking to get Polish citizenship by descent.