I can tell you why I might give up Rdio for Spotify, depending on how this trial goes.

I have been a Rdio subscriber for about 3 months now, and I really only have two complaints. The first is that when I'm listening to Rdio at work (which is where I use the service most often) the stream tends to hang up and/or "stutter", to the point that I eventually get frustrated and turn it off. Now, we have pretty decent bandwidth at work, and other similar services (e.g. Pandora) don't seem to suffer from this problem, so I'm not sure what Rdio's problem is.

The other problem I've observed with Rdio is that a noticeable amount of time passes between the time I press "play" and the music actually starts. This one's not such a big problem, but it is a problem.

So, I've just signed up for a Spotify Unlimited plan and I'm going to see how it stacks up, especially with regards to the aforementioned problems. If it seems to perform more consistently than Rdio has, I'll probably switch.

I'm an Rdio user and I've been trying Spotify today. I'm not thrilled with their music library. There are a bunch of bands that I love that Rdio doesn't have (Arcade Fire, Shins, Ramones, Pink Floyd, older Flogging Molly, newer Eisley, etc.). There are only a few albums that I really want that Rdio doesn't have, by contrast.

I feel like Spotify's UI is just a gray iTunes, whereas Rdio's UI is more in line with how I think about music. The search function in Spotify is really poor compared to Rdio.

Rdio blows away Spotify in terms of the discovery and social aspects. I really like the ability to follow people that have the same tastes as I do. I've found a bunch of new bands that way. With Spotify, you have to find friends on Facebook and Twitter. And no offense to my friends, but I think their taste in music sucks.

I'm sticking with Rdio.

It's true that most of the bands you listed were not available a while back, but I believe all of them are available now. We are missing some Pink Floyd though.

If there's something missing that you really want to see, make a request here: https://spreadsheets.google.com/a/rd.io/viewform?formkey=dHd...

And thanks for sticking with rdio!

I just cancelled my Rdio subscription because of missing artists. There's one really really easy way for you to fix this issue though. Let me manage music that's not in your catalogue so I don't have to pull out iTunes, and so I can mix and match those songs into Rdio playlists.

Oops! I totally meant that Spotify doesn't have those bands. Rdio definitely does.

You guys have a fantastic product. It's easy to stick with it.

I'm pretty sure that dstone meant to write that Spotify was missing those bands (e.g. Arcade Fire et al), not Rdio. I've been listening to a good bit of Arcade Fire on Rdio lately, and just confirmed that they aren't available on Spotify.