I have in the past. It's a fiasco, but that has more to do with pit trading in general that OEC (although their fills can take literally hours to come back).
With pit trading (at OEC and most other brokers that offer electronic order entry) you can enter the pit order, but the fill depends on someone typing it into their system, and that is subject to long delays, plus they sometimes screw up and type it in wrong (so you find out later you got a different price than you thought). Since nearly everything now trades at least side by side electronically you should avoid pits as much as possible. That said, often the electronic contract will hit prices the pit contract doesn't, so if you are using stops you can get hit when the pit never traded there.
