Datek does not allow you to trade OTCBB stocks, nor do they have options trading (although they've talked about offering it for a long time now). Just like the other brokers, sometimes you can't get a response from Datek's servers. I rarely use phone support, so I can't tell you how quickly they respond. But their interface is easy to use and quick for order entry, and there are several third party interfaces that make order entry even faster.|
Don't count on the free commissions if the trade doesn't execute after 60 seconds. You really end up losing money because your order is likely to have executed at a bad price relative to the market. The caveat is that the order must have been marketable for those 60 seconds. I've only gotten the free commission on several trades out of many hundreds of trades.
Overall, I like Datek because the order entry and executions are typically very fast, and the commissions are low.