I've been using the SoundTower p6 editor for a few weeks now, it was quite hard to setup (mainly due to me diving in there and not reading the instructions! Lol) but once it is properly configured with the correct Usb drivers and both RX and TX set to the right device, it works very well.
The editor adds a lot to the functionality of the P6. I like the visual representation of the position of the panel knobs, envelops and controls. The ability to name, catagorise and shuffle presets and manage all banks is a huge addition to the instruments utilities. I haven't experimented yet with the sequencers visual edit tools or the patch morpher but I will and I'll report back.. Good stuff!