Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Extremely Disappointing

I have to say that this is the first thoroughly disappointing product I bought from Amazon. I purchased this for my son's 5th birthday. When I took it out of the box the night before his party to put it together, I found a) that the bike was white and not blue as depicted in the picture; and b) that the package was missing a few items - including the SEAT?!?!? I debated whether or not to order this based on other reviews and cave in given my son's great love for spider man. My mistake.On the positive side, Amazon was quick to offer a refund (replacement is not an option as of 8/23/12 given that a number of people had issues with the bike). As always, I'm grateful for Amazon's customer service.