Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I'm going to return it

I have an American Heritage Talking Dictionary(AHTD) on CD-rom, 3rd edition, based on 92 ed dictionary. I bought it in 1995. It's very good. I can find most of medical terms, except those very specific ones. As a result, I didn't hesitate to buy this electonic dictionary. However, I am disappointed.I can't find most of medical terms in this products, like ramus, psoas, leukocytosis, adduction etc. All those words I can find in the AHTD CD-rom. I wondered how come the new dictioinary had less words than the old one. Then I checked the information on the back of the dictionary, it said it's based on the CONCISE AHD, 1982 edition. No wonder. Before I bought this electronic dictionary, I couldn't find such information on the web, only saw that dictionary has 220,000 words.