If you can say "pushchair", you can pronounce Maruszczyk!
Being Polish and having spent the first quarter of a century there, I've owned quite a few Polish basses and guitars - a couple of early Mayos, Mensfelds/MEGs (these were brands previously manufactured by the factory now making Maruszczyks and Mensingers), a GMR and more. They are as good as anything, if leaning towards the modern end of the spectrum.
As I've been on a P bass kick last few years, and out of the few Fender Precision, none really vibed with me (one Player, two Am Stds and a Nate Mendel), I got myself a Buzz ordered from Restauracja Gitar. Turned out brilliant. Very responsive instrument, lively and resonant. Something I haven't experienced with modern mass produced Fenders (although my old MIJ Marcus Miller was like that too, maybe to a lesser extent). Now they're not entirely made in Poland as Mateusz orders necks and bodies in batches from Japan, but the assembly, finish, fretwork, nut etc are all as good (or better) as anything I've seen or played. Plus fully custom. And that's for around the price of a new Vintera.