I have it too, but haven't read it yet. I started it when I got it, but it was too difficult. I really should try again now I have read some learner's books.
I read an interview with the publishers, who said they had no intentions of translating any more of the HP books. They do seem to be doing all the Artemis Fowl ones. If I'm honest, I actually preferred Artemis to Harry Potter. I stopped HP after about book 5 because I didn't like the direction it was taking. But I can't tell you much about the translation of Artemis, because, again, I looked at the first few pages and understood very little, so it's on the shelf for future reading!
Oh I nearly forgot - there are vocab lists for Harry Potter on Memrise. I did find them quite helpful for the three pages I managed to read. Maybe this summer I'll have another look at it...
