Where it is can be found at their website wendels-bakery.com . Basically one in Tienmu near Sogo (5 minutes walk from Zhishan MRT), and a new branch near SYS Memorial Hall MRT. Even though the owner can be a bit weird at times, the bread is outstanding in my opinion. Simply the same quality as back home in Germany. The susages were disappointing, though, and the restaurant in Tienmu is just OK in my opinion (with the exception of the cold cuts, which are great). I am looking forward to trying the Flammkuchen there, let's see if it is on par with my homemade one
Ok, so what's good bread there? For my (very occasional) bread craving I by far like best Wendel's "Kosaken Loaf":
Pretty dark, very moist, yummy crust. Godly if its still warm. Of course which bread is best totally depends on personal preferences, but this is also what I liked best back in Germany. Very affordable, too. The house bread was recommended to me many times, with similar properties - but so far I didn't get the chance to try.
Some of my other favorites are for example all of the "Laugen" (Lay) stuff, which I normally eat with salted butter. Besides Brezeln (Pretzels) those would be Laugen Cheese Bacon (especially if you ask them to warm it up and you eat it immediately, Laugen Croissant, and the simple Laugen Stick. Also good are the Onion Roll and Malt Roll.
Yes, they have lots of localized stuff. One of these that is surprisingly good in my opinion is the Tunafish Bread with its garlicky, well spiced filling.
Extremely popular with both my Taiwanese and German friends is the Banana Cake, a thing I never had in Germany, but learned to love here. Sweet, moist, natural. Also described by A Hungry Girl's Guide To Taipei. The Donauwellecake is pretty good as well, even though quite different from the way I am used to bake it. At Christmas time, their Stollen is very good in my opinion, but pretty expensive.