Well testing on my Desire I wouldn't say it was perfect..
It seems to pick and choose when it has album art (even though in the folder is every possible album art file)
There is quite a delay between changing tracks which is actually causing a brief popping sound.
Everything is pretty laggy, I would expect the pause button to be instant, it is not. The fading also seems to slow down down your progress through the menus. I like the effect but I think it made be compromising the performance of the app.
If I go from the play menu (with the full size album art) then slide to the playlist it seems to dislike me choosing to play the last track! It will not select at all. If I go back through the menus I can choose this rack no problems.
Ok it just did a weird one.. I had it paused on a track then went and selected another track and it played maybe 2 seconds before stopping the track. Selected it again and it plays.
Is the visualisation supposed to work on the free version?
You have a typo on 'Media Preferences'
I hope some of this is useful as I like what you are doing
however honestly I would be a quite unhappy if i'd paid for the Pro price how it is now and I DO have one of the higher spec phones.