Pros/Cons of joining a MM bank that's building a team in a new city?

What are the pros/cons of taking an analyst offer in a city (a Boston/SF/LA) where a MM bank is looking to build out an industry team? The bank isn't a no name boutique but in the league of Piper Jaffray/BMO/Baird/HL.

Would it be lots of pitching? Would taking the offer be a bad decision? What are your guys's thoughts?