They have multiple platforms for trading. The one QuoteTracker integrates with is MADWare. There is a native MADWare client software that can be used to place trades on the same account that is used to trade through QuoteTracker - trading only - no quotes.
QuoteTracker can be used with Scottrade free quotes. As for them being better than DATEK, not by a long shot. Scottrade data is notoriously bad. Volume data is always lower than actual and reliability is far from the greatest. The free Scottrade quotes are limited to 10 symbols at a time (brokerage account limit is 20). With DATEK, you can get 80 at a time, and Level II
the crossed quotes are not really a DATEK thing. Thats just the way NASDAQ quotes are. Noble does not provide the quotes themselves. They will cover the cost of your subscription to Money.net though: http://www.quotetracker.com/money.net
Money.net is also max 80, but is tick by tick, where as DATEK is not. If you ask them, they may cover a different datafeed most likely.