It's 5 per side, so 10 $ round turn. Fills are the same as mostly everywhere: it's MAN Financial you're dealing with. XPRESSTRADE had much worse fills for commissions three times more expensive...
Give a look to http://www.elocaltrading.com, now TradeMaven Group (TMG). You can still use Jtrader standalone with an excellent datafeed from RCG or TradeMaven with the datafeed proprietary they developed with Transact. Run a search with ZAL as ET member to read more info. Training with TM is scheduled here: http://www.tmdownloads.com/trainings.html
Sounds like they have $5/ hour college kids who care more about the next episode of The OC then your orders.