They're great if used properly. Keep your stops tight. These things were swinging +-25% daily in early August. They are supposed to be for day trading but I've found they're suitable for swing trading with a clear trend to follow. But can't stress enough if you guess wrong cut your damn loses. These 2 etfs will ass rape you.
I was watching both of these yesterday on a percentage basis. I noticed several times when both where showing the exact same percentage (one loss & one gain) that you could enter a buy on both and close out with .1% or greater gain in a matter of minutes. This could add up nicely in a day if it could be executed efficiently.