I have been only "playing" with digital music for some time, but never really seriously until the last year or so. I used to have a few mp3, wav etc here and there, but I was still using mostly CDs. Then I started my own business and working from home, so I began to listen to music more and more while working.. not that I couldn't before, but I felt that listening with headphones and similar at work was "isolating" me too much from the rest of the office, and speakers in a open space sw shop are no kosher.
So here at home the problem was that more often then not the cd in "loop" mode would drive me nuts : my full cd collection was 2 floors down and ,as every respectable geek, if I can't get there pushing my office chair it's definitely too far. So I started looking seriously in digital music. I did a few semi-manual rips (including renaming manually the tracks !!!), and then pretty quickly started looking for something better. When I tried MM I was pretty impressed, it did pretty much all I needed in a nicely integrated pkg. I bought the registered version and also registered to their MX radio. So for some time I was pretty happy and ripping away at my Cd collection, downloading music etc. Then I reached the point (probably when I crossed the 10 gb of music and I got an Archos Jukebox 20 GB) where organization and playlist became one of the most important thing, and realized that MM really sucks at that.
A few more searches and I discoverd MJ ... and I just loved it and it took me no time to switch... Actually that's not entirely true: I still use MM for the MX radio. I find it very convenient, realiable, with reasonably good selection, well priced and the music quality is very good compared to the average free streaming source.
So my generalization is that the opportunity for MJ is to catch user that are growing out of their existing music tools. I believe that trying to "dumb it down" to appeal to the first time user would not be the best strategy, since that part of the marketspace is already quite crowded with some well established brand and also because I believe as digital music matures there will be more and more need for the more advanced organization features ala MJ. Competion will not stay still but MJ has a significant advantage, so I believe it has a good chance.
Now subscription services are also obvioulsy very appealing for the substained revenues that they can generate, and I would say that is another area that should be looked at, but I don't have a lot of knowledge of the issues at stake. Again my personal view is that, with the current state of the digital music marketplace, the MM Mx radio works for me (selection, price, quality): my only regret is that I need to use clunky MM to access it instead of my favorite jukebox!
Claudio