The Rai Penta is a great little IEM...especially suited for traveling and commuting given its ergonomics and sound isolation, in addition to it's great sound.
Mine arrive on Wednesday but most likely after I leave for the airport already. Was really hoping to get to test these on a flight and for travel, but they'll have to sit at my desk alone for three extra days!
My IER-Z1R come Monday, which aren't nearly as well suited for travel. But I guess I'm gonna have to put those through their paces anyways on the road.