Pros
As the title states, I worked at BDO for a few months before I moved on. The company overall seemed very well. There was actual training to get you started (though I had already learned most of it) and they had a lot of resources from various groups. Most if not all of the people were friendly.
Cons
The only downside for me was the group I was part of. I was part of the newly formed and growing small business group. The issue with this group was firstly the manager though smart lacked certain skills. For example she had stated that if the client yells at her, she would yell at us, which is fair. I just nodded and agreed. The other issue was she had no other real work experience except BDO started off as a co-up and worked here way up, she had no other work experience and perhaps lacked other skills. Finally the last down fall was the group was to large for one manager to manage. It was roughly 15-20 people for one person which I think is way to much.