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Tried the demo and purchased a license pretty much immediately.
One thing I've noticed is that using the (slow) EDGE network, it typically takes from 45 seconds to 2 minutes to load up the Now Playing page.
Usually, the 'user interface' pops up first, but the actual track information takes much longer to load up. This happens even if there is no available album art, so I'm not sure why data transfer should be so slow.
Is there any way to either speed up the data transfer for the current "Now Playing" page, or else have a 'slimmed down' text only version (perhaps added to the "Music" button)? For example, if I use the text-only "Music" button interface (instead of "Now playing"), navigation is fairly quick even over the EDGE network, so long as I don't try to look at lists of hundreds of songs.
Speaking of which, since the iPhone doesn't have a 'Search' functionality within a web page, there's little reason to even list hundreds of tracks -- it takes forever to 'flick' scroll through them all.
I think with iPhone / Remote Buddy, practically, you are limited to using only short playlists.