Thank you, I would have never tried it if not for this post. I have not spent a cent and I am enjoying the game a lot.
You can play on your PC with an app(Mobizen) if you like, but tablets are great for this game.
There is so much to love in my past experiences I am not sure I can do any one thing justice by posting here. I would have to say the thing that has always kept me coming back is the community, always new content and the depth of it all.