I'm giving Baltyk Bakery a "Very Good" rating primarily because of their "very good" ("excellent"!) sunflower rye bread!
The bakery is a rather austere and uninviting interior space located in a small shopping mall on the north side of the city, near an important LRT (Light Rapid Transit) station, so it's very easy to get to. They have a freezer case of Polish-style perogies, and lots of fliers, newspapers and other printed literature on the tables and posted on walls and windows telling the Polish community what's happening in the city at that particular time. The bakery used to have a small selection of fresh garden vegetables brought in from the country that you could buy, but I haven't seen any there for a while.
A nice attraction here is that there are often free samples of their fresh baking (many with poppy seeds!) on the countertop to have a taste of. Sampling them really helps in deciding what you like and don't like---and want to buy. There are lots of pastries, cookies and cakes for sale. The few I've bought have turned out to be too sweet for me, but I have to admit they are very prettily decorated! They do make good cheesecakes, though.
I go here mainly for one item---their delicious light rye bread with crunchy sunflower seeds, baked fresh daily. (Note: there are no preservatives in their breads, so the shelf life isn't that long when you bring home your purchase. I've found that out the hard way---mouldy rye bread isn't that appetizing!) They have a good range of other breads also.
As for the customer service---it depends on who is there when you go in. About half the time there are some middle-aged, older women who are polite and smiling but not overly gushy. Sometimes, though, I've had the misfortune to have been served by a really grumpy and quite rude younger woman. You take your chances---and when she's serving me, I just pay and run!