I think the whole 'package' she offers (either the records or the concerts, or the videos for that matter) is excellent, and I'll be Captain Obvious and point that a lot of that is thanks to the hundreds of people working on that (producers, engineers, arrangers, session musicians, film crew, roadies, etc.).
That doesn't mean she doesn't deserve her success... she does, obviously, and she's got that unique mixture of looks, talent, perseverance, luck, momentum, timing and good management in order to understand the 'game' and be incredibly successful at it.
One thing I do NOT like is her breathing technique, but that's just me being grumpy and picky. I love the production of 'I Knew You Were Trouble', it's so clean (well, it's Max Effing Martin after all) and detailed.
I'd like to meet her, but I'd LOVE to meet her producers, engineers, etc., I think they're true masters.