We have had accounts with this company since 1995.  It has gone through many changes, but we have generally been highly satisfied with the service.  Pricing is most favorable, too, except there are a few nuisance service charges, such as the $25 "reorganization" fee when a company is bought out and the stock is liquidated for cash.  In theory, this should generate another brokerage commission, but TDAmeritrade apparently doesn't agree.

I have had a number of service problems over the years, but they have all been resolved thanks to access to a live person, rather than being forced into e-mail...