I switched to Scottrade from Citibank/Salomon Brothers about a year ago.  I have been very happy with their service so far.  Also, at $7 per trade, compared to $25 at Citi, it was a no-brainer.  There are no account maintenance fees either. 

Their website is easy to navigate, and they have branches all over most cities- so they can always answer questions in person.  Their customer service at the branches has also been excellent.  There are a few improvements I would like to see:

-Offer dividend reinvestment, which is a great way for investors to build their portfolio.

-Allow investment in...