The following report compares gadgets using the SERCount Rating (base on the result count from the search engine). Note: due to some search engine quota, not all result is available yet.
Merriam-Webster database with over 80,000 words & 274,000 definitions
3 line display
Phonetic spell correction
Rating: 1.67/5 from 3 reviews
great for young teens
Rating: 3/5
My 11-year-old son got this as a gift and uses it constantly. He looks up words he's not familiar with and plays the word games to increase his vocabulary. We even play together sometimes! I plan to buy some for gifts.
Disappointing
Rating: 1/5
I thought this was something I would use and enjoy. After just a few uses I can't be bothered with it. Most of the words I tried to looked up were not there. It may be of use to a gradeschooler, but anyone with a higher reading level would get nothing but a bookmark and I would rather use a paperclip.
Franklin PageMark
Rating: 1/5
This was a very disappointing product. I think it is a great idea - and bought 3 of them to give as Christmas presents. I'm returning 2 because it is useless. The dictionary is way too limited. During my first day of use, I looked up seven words and three were not in the dictionary. All three are readily available in my regular dictionary. All of the resources spent on games, address book, etc. would have been better spent on improving the dictionary.