I played it for years, liked it a lot and had some very fun times there.
It's completely free, and you can play it on whatever device you want, you just need to be able to browse the internet.
It's a text-based MMORPG, and it's very addicting and fun. I quit the game because the game was controlling my life too much and if I hadn't quit then, I would probably have failed my year. I was constantly thinking about it, it was always on my mind, and while I needed to study I was literally writing things up I had to do when I got back online.
I'm glad I quit, but I plan on returning when I have finished school and I have a mobile that can go online everywhere.
Anyway, fantastic game and athmosphere, and completely free.
I can honestly say, this game is the best game ever IMHO, you can play it for years, yes, years. There basically is no end.
Only con is that the admin, I think he was named Chedburn, isn't that good at listening to his members and he only adds things not a lot of people like.
Also, this game has gotten very big, almost 1,5 million active members!? In my time, there were around 400k, that's about 4 years ago.