Suggestions to buy a digitizing tablet that respect the freedom of the people

Hello everybody, ¿how are you?

First of all, sorry for my English mistakes :S

I am thinking of purchasing a digitizing tablet for my Trisquel 7. That's why I went to h-node to see what I could find there, but I had no luck :S

Can someone share with me any experience on the subject?

What brands and models would you suggest me?

I understand that the Wacom tablet supports Trisquel, but I don't know anything about the more suitable models. I asked in the Castilian forum, but there people have no much experience about the topic.

Many thanks in advance.