There is definitively a lot of nice beers in Poland. Since the day I arrived over 7 years ago to nowadays, so many things has changed. Pinta is a great Browar, AleBrowar too. I like Amber Beers even if they are more "normal".
As I love White Beers, the Pinta one was the best one I ever tried for ages.
There is a new one in Torun as well. Olimp. Looks promising.
And plenty more micro-brewery. Or pubs that brew their own beers.
Actually, if you want to try a good beer, it's kinda expensive compared to the mainstream ones. But the pleasure and the experience is way better.
It's great to live in Poland right now as they experiment a lot. But as I grew up drinking Belgium beers, they lack something here sometimes. Everybody is trying to make IPA or Polish IPA or American IPA. It's IPA all the way. There is more diversity in Belgium. More subtle taste.
I hope that they will diversify their offer a bit more - except Pinta that has a lot of different type of beers.
I find the mainstream beers boring, tasteless and difficult to drink. If I had to choose one brand of the big sellers, it would be Okocim.
I like Ciechan as well, normal beers. I don't know if we can consider them as a big brewery. May be they are like Amber.
Check out my website - atable.pl/atableblog/category/boissons/biere/ - I write about beers sometimes.