No 2. Cost
It costs $499, which is not too much, seriously. Compare it to the other tablets and you will immediately notice the stark difference in price and performance.
No 1. The Experience
It is the best, as hard it is to say, but it is. There is unfortunately no worthwhile competitor to the iPad 2 yet. Its user-friendly features and great application selection among numerous other features make it an easy choice. The iPad 2 is fun, entertaining, productive, easy to use and best of all it has no complications whatsoever, buy it and start using it, nothing more.
Here is one another iPad 2 video: