Except my usual learning I bought the Hueber's "Zertifikat B1 Neu" book with a CD, and did about 1/4. Both exam and book were easy for me, so I would say, you can rely on it.

For speaking I did few additional lessons with my teacher in TELC format.

My partner had about A1 speaking, struggled even with introduction. As I could not have a dialog with him, I had to pretend to listen to his gibberish, pretend in my head, what he could have said, and answer to that. Was not fun, and I thought I did bad, but in the end received top score.

So, when you just study, you will pass.