I finally got round to playing with MojoPoly. I bought them last weekend and I wanted to wait for the app to drop to really try things out.
First, I'm in agreement with most others, the GoFigure app makes the device much, much more usable. Having the visibility on what's going on clarifies things greatly. Thanks for that. I only used the pin for an hour or so but this is much better.
Most of the modes make sense to me. Hotspot mode (either way around) work with glider, and as a Spotify connect target over airplay (confirmed by turning the bluetooth off on my phone). I can also use it as a DLNA target from JRiver on mac or PC and I'm streaming DSD files now. I had to look up the slightly pink light issue to make sure I'm getting full bitrate, but I believe I am.
I assume that the Bluetooth/airplane mode is just for use when you shouldn't be using wifi, like on a plane.
One thing I noticed is that my MojoPoly (specifically the Mojo) seems to be very susceptible to electrical interference. I got very upset as I thought that the Poly was being very noisy with lots of static noise. Through testing I narrowed it down to the Mojo, but I noticed that if I moved my phone away from the Mojo, the noise lessened and went away. I tried it on wifi, hotspot, and with and without bluetooth enabled on the phone and there was no discernible difference or pattern. I wonder if anyone else has that issue? If anyone has an issue with background noise, which I think I read earlier in the thread, you might want to try moving your phone away from the MojoPoly.
With Glider I too am having issues with connecting over multiple methods: using the speaker icon or the poly icon. When switching between them I sometimes need to switch multiple times or quit and re-open the app before it'll connect. Once connected it's fine, but then switching again can cause issues. I haven't found a consistent pattern yet. If you want help debugging or testing a beta, let me know, I'll gladly install and report issues. I've worked as a QA for software engineers, so I'm able to give decent feedback.