Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Worked like a charm all over England. I haven't tried the other adaptors, but I found my MacBook to work just like it does here in the US, and there was no difficulty plugging into the outlets.
Positive

I was very happy with my product I absolutely love it!!! And it was brand new at a very reasonable price. Gonna continue my shopping on amazon.
Positive

this tour was very person and as janet represented from the start of the concert, an open book of HER story of her life, music, feelings and so forth. The concert begins with a big book being opened and then seperated into two screens then comes janet. She sings songs from velvet rope which are perfectly mixed with classic dance hits of hers over the years. A lot of the control and rhythm nation songs were made into medleys though some of the ones with intense choreography like If, Rhythm Nation and so forth were performed wonderfully. Janet also created great new chorography for what about, you and i get lonely which could have also been singles. I wish Everytime was sang on this show though that ballad is just so beautiful. It was great to see rope burn and special included.
Positive