Well, the setup process was certainly easy. I registered at the Rockna site, downloaded the app, plugged in my I2S cable, and was ready to go immediately.
The sound so far? Disappointing. My iDSD Pro isn't the world's greatest DAC, but I had completely optimized my setup, and I got used to the iFi hardware upsampling to 784K or DSD. I've been pressing buttons on the Wavelight trying to get it to upsample, and guess what, the Wavelight doesn't do that. For some reason, I thought it did.
Compared to my optimized iDSD Pro, the Wavelight in my setup sounds a bit forward and a little strident. I'll give it more time and there's a lot more fiddling I can do with cables and such. I've got HQPlayer Embedded going on my music server, so upsampling is taken care of now.
Granted, it's only been plugged in for a few hours, but first impressions are meh.