Moving to Spotify from Rdio

[Feddar]

I've been trying out Spotify because I have been disappointed with Rdio's quality and dependability of late.

I am finding Spotify easier to use, faster, better sound, and much less gaps in music (there are still some, but ususally they last 1-2 sec, rather than 1-2 min requiring restarts).

My questions are:

1) Is there a playback history on the iPhone app?  

This would help a great deal in 'finding that tune that was played while I was driving..."

2) Can you add a whole album to the queue?

I use this when going through New Releases.

3) Is there a way to mark a favourite?  I see the "star" playlist, but it seem just like another playlist.

This declutters the collection and playlist sections greatly.

Thank you very much.  I find the quality (actual sound) and dependability (no gaps, ease of use, fast response) of playback to be the most important thing in a music service, and Spotify seems to trump Rdio on both counts so far.  I hope this is never sacrificed in the name of features, which is what Rdio has done, in my opinion.