Worth whatever you pay for it!
I know that there are already a lot of reviews of this product but I think it deserves another one.
I am studying Japanese at a Japanese university at the moment on an exchange prgram from an English University and I use this product everyday.
I'm going to look at the strong and weak points in comparison to a standard electronic dictionary.
Strong points:
*Price (you will pay a lot more for an electronic dictionary with the function of a touch screen to input unknown kanji)
*The ability to enter unknown kanji (there is also a drop-down menu of kanji with the same number of strokes/radicals etc so you can find the kanji even if you enter it incorrectly)
*The fact that there is an English-Japanese and a Japanese-Japanese dictionary on this - as you progress with your studies you will increasingly come across terms that cannot be translated. However this dictionary provides an explanation in simple Japanese.
*The Genius dictionary is also well-respected and has let me down on very few occasions.
*The DS has a lot of dedicated kanji-learning software so buying this dictionary plus a DS will be cheaper than an electronic dictionary, plus give you the freedom to try these other products. (such as Kanken, etc)
*Pre-loaded quizzes on kanji for countries etc - they are very difficult but useful!
*Portable flashcard program allowing you to enter your own list for learning although it is limited to quite a small number.
*A lot of example sentences which help clarify the different usages of a word - very useful to save one from embarrassing mistakes!
*The ability to change the size of the kanji on screen to help with writing it.

Weak points:
*Doesn't contain any kanji for Japanese names. However, you can look up each individual kanji in the names and combine them to get the reading.
*Cannot use the other kanji learning software or play games in japanese at the same time (like you could with a separate dictionary)I have taken to writing down any unfamiliar kanji and checking them in this dictionary afterwards.
*After entering a word in English and being given the Japanese translation, the Japanese translation appears in kanji only so you must copy those kanji onto the touch screen to find out the reading.

Overall i think this software is worth everything I paid for it and more as it has become my constant companion. So far, as a result of me using it in my Japanese university, five other exchange students and Japanese students studying English hav purchased this software and all recommend it highly.
Definitely a very competitive alternative for anyone looking for an electronic dictinary but without spending so much for an applicance with only one use.
I will be looking forward to further software from this company and looking for similar products in other languages!

Excellent Reference
While obviously not meant to teach you kanji, the "game" serves as an excellent (and much less expensive) substitute for a denshi jisho. It makes it easy to look up unknown kanji since it doesn't require that you write it with perfect stroke order. The recognition is occasionally a bit iffy, but generally is quite good, and it quickly identifies kanji and words associated with them. It's also quite convenient that it can work both as a Japanese to English and English to Japanese dictionary.

Good Dictionary
A cheap electronic dictionary with an easy and somewhat fun method of looking up words/characters. I like that it combines a Japanese-English/Plain Japanese dictionary in that it means that as I progress in learning my Japanese I'll be able to switch from using one to the using other, but in the meantime it's still pretty accessible.

A Great Supplement
Anyone who is studying Japanese should consider purchasing this software. Most electronic dictionaries can run you close to $300 or more for a touch interface. While not as complete in terms of vocabulary, this software is still a bargain to beat all bargains. Even though I have an electronic dictionary, I still purchased this and use it frequently.

great dictionary
just draw the strokes on the touch screen and this dictionary will show you the right kanji for it with useful example phrases etc.
I use it almost everyday if I'm reading Japanese text or if I have to do homework. it's a very useful tool for people who learn Japanese!