Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Save your money

I saw Jakob once at a usability conference and all I can say is "What a friggin' ego." The whole beginning of his presenation was a series of slides showing what magazines he's been featured in. It totally eroded any semblance of scholarship I may have once thought he posessed.And if you don't think ego is involved, check out his rates on the neilson/norman consulting site.