I mined here for a little while, but I decided to go to a pool that prevents pool hopping. As I looked at the statistics of each new block a huge influx of miners would come in for a couple of hours, and then disappear leaving the rest of us mining the entire time, but a large percentage going to those with large hash rates that just stay long enough to maximize their profits. I don't necessarily think there is anything wrong with the hoppers, but I just prefer not to mine at a pool that allows it to happen.