How do you explain to your spouse that a certain gift sucks?

I’ve been talking to my husband about the Kindle Fire, because I’d really like one for Christmas this year. Several times, however, he has said, “I got you a tablet last year, why do you need the Kindle?”

What he got me last year is the Pandigital tablet, which really really really really (infinite really’s) sucks. I can’t download anything besides books to it. It’s the worst possible “tablet” on the market. I can’t download movies, music, games, or anything else. It’s supposed to be a “tablet”, not just a reader, but it does not work for anything at all, besides the ebooks.

He knows I haven’t really used it all year and he doesn’t seem to understand why. I don’t want to hurt his feelings, but I’d really like a working tablet. How can I gently explain to him that I know he was trying to get me a really neat gift, but it doesn’t work properly, and that’s why I want the Kindle Fire?