Yes! I will vouch for the sidekick 2 and the sidekick 3!
I have had a sidekick for going on two years now and I could not be happier.
The battery life is decent (about a day) but whats great about the new units are the batteries are removal plus you can still buy other batteries if you like having two.
I've bought body armor for mine that was plastic and a screen cover that has saved my sidekicks life about three thousand times.
I'm planning on buying a metal case once more money flows in, a good website for accessories is:
http://www.daydeal.com/home.php?cat=...FSCTWAod9TOnSQ
To be plum honest I have never tried the MP3 player on mine but I've heard good things.
I have a 1G card also which cans tore roughly 2000 pictures.
I take notes for class on mine, I have important dates in the calendar and everything else under the sun.
Also whats wonderful is I'm constantly on AIM.
I did drop mine once and a piece randomly disapeared and I was able to get the unit replaced, especially since I had paid $350 for mine when they were brand spanking new.
My sidekick 2 died only because of me, it suicided into the toilet while I was changing after work one day. It buzzed to death for hours with nothing for me to do but be in horror.
So keep that lesson in mind, they are not waterproof.
The screen is awesome and holds true to its flipping nature.
To scroll around the Sidekick 3's have trackballs which are quite an upgrade compared to the 2's.
Overall I think its the ultimate phone.
Go for it.
I've had mine for coming up on a year.
Another thing is you can email notes to yourself, photos, and text and get on the internet for like 6 dollars extra a month for unlimited everything.
Hope that helps you decide!
I honestly have only seen one other person with the Sidekick3 and I was shocked.