I've been in career mode twice and had it crash and the saves I had were corrupted and I lost a weeks work of progress each time.
I only found this forum after deciding not to play it anymore. No reason to invest anymore time until they fix. I didn't ask for a refund because my son likes playing it and I love doing it with him but it's been collecting dust for a month because I don't see any reason to start another career until they fix.
They really should take the people seriously who are threatening to ask for a refund. I might be one pretty soon.