Good antennas. The RP SMA annoyed me, I burnt a TX because it was like screwing two female connectors together, they don't make contact. With SMA, you won't burn a transmitter because they transmitter will either screw onto the antenna or the antenna won't screw on because it has a pin in the way. I bought them on sale, for $5 a set at the time. For that price they are a good deal. For the regular $10, that is a good price though I would consider making my own. The work well, I don't know the actual technical specs as I don't have the equipment to do so. They are right hand polarized, so don't use a left hand or linear polarized antenna. There is enough clearance for me to directly mount them to my receiver in my Dominator V2 goggles. I am considering spray painting them a different color as the copper is starting to get the natural faded look. Note that will reduce your range by a few feet or so, not that noticeable. They were packaged okay, they didn't really come with much protection, just in a thin cardboard box. If they are bent, either in shipping or in a crash, it isn't too hard to bend them back into shape.