It's not amazing it's about average. It does what it does but it's like most of GUI softwares on linux: Half-done right waiting for someone to finish it. Bit like "look what I can do also". Hopefully it improves after couple of fw updates.

.edit
And when we are talking about performance issues we have to remember that there is different kind of people. Those who do not recognize difference between 25 and 50 fps and those who see difference. Addition to this i really want feedback and speed from this device as Steve Jobs puts it: "Boom". click and music starts to play/stop etc. No 1s pause just immediately like it does on other devices.