In the comments to the posts about the launch of Google Music in Russia, I have several times seen the comments “oh, it’s a pity that you can’t make the added music download immediately ... you need to make two more clicks ...”.
I found * a very useful, in my opinion, feature of Google Music that I want to share.
Namely, you can automatically download recently ** added music.
This is done simply - in the “playlists” section, you need to ask for “Save on device” the “Added recently” auto-compilation, after which the music previously added to the music library begins to load. When you add another album, it is also downloaded to the device (the download starts in 30 seconds).

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If I understand correctly, the feature works when the "full access" is enabled, and when you buy albums separately,
and when you upload your music to the "cloud". However, for my taste, this feature is most useful when using “full access”, when you can add music to the music library so quickly and want to save two more clicks on caching.
Personally, I often add several albums at once for familiarization, so I don’t exclude that the novelty “I'm feeling lucky” (it works offline!) Will also be very helpful.
* - It only worked for me from the upgrade to version 5.2.1233L of October 17, and earlier, when I tried to save the playlist “Added recently”, an error occurred. In the comments they write that someone has worked before.
** - I don’t know how much music is considered to be added “recently”, but I have more than 30 albums in this list added since the launch of the service. It seems to me that 30+ is more than enough if we assume that the “most favorite” is added to offline forcibly.