If you're bringing a laptop or expensive equipment, I'd recommend looking at a converter rather than just an outlet adapter. Check the spec book or Google the specs for that particular item to find out if you may need one.

Otherwise, there is a slightly different adapter for northern and Southern Europe...I can't recall which one is used in Hungary, but since they are only a couple dollars, you might want to get both. I always bring both types and find that sometimes I'm able to use them both at the same time.

I've had no issues using the simple adapter plugs for phones, cameras, and iPads.