Finally, an Apple product or service that I am not happy with.
Just signed up for iTunes Match, the service that stores all of your songs "in the cloud" (or really, "in the iCloud"). I haven't had any problems with the other iCloud services, but so far, iTunes Match is just a big fail on my new iPhone 4S.
Ever since I turned it on my iPhone, the Music player just seems to be buggier than I've ever seen it. When I have a playlist on shuffle (my usual mode), I will usually get two or three songs into the list before it just stops playing. The little play triangle is present, but the timer doesn't move forward and no song is playing. Skipping forward and backwards shows different songs, but still no sound.
Then I'll get tracks that don't show the artwork. But if I go back to the Songs pane and restart the track explicitly, the artwork will be there.
And sometimes a song will be playing, but the wrong song will be displayed! If I move forward a track, the display will skip two tracks, with the extra track in the middle being the one that had been playing.
I'd like to use this service - it's cool to get an urge to hear something and be able to get it from my Mac at home right away. And for what it's worth, the Mac and Windows iTunes clients seem to be working correctly. But until the iPhone client is cleaned up, this is going to be a no-go for me. A big disappointment.
Updated: Well, I turned off iTunes Match on my iPhone and went back to the explicit syncing - and I am still getting the hanging on shuffle mode! I'll have to see if the other symptoms are present also, but maybe this is just a base iOS error of some kind. I definitely don't recall seeing a lot of mentions of this bug around the Mac blogs, though.