When square-enix does something, they go all out.
As through your travels you will find your party right at the start and wont lose them for the longrun of the game. While playing through the game the extras such as the "Legendary Blacksmith" will not have much noting to really tell you how to get it without using a guide of somesort. Also some parts of the game really give you no lead on where to future your adventure to. What really gets the attenion or affection from some fans is the old style that fits right with the newly enhanced graphics. You will surely want to complete this game's story right away and throw all your fighting tactics against the final boss.
Now lets talk about the job system. The job system was a great addition to Final Fantasy III DS because it goes so well with the gameplay. Such as you need may want a thief to steal some items or unlock doors, or a red mage to pick up for the lower magic of a black or white magic caster. This is basically the reason they left you with the same characters through the game and them not leaving once after the start. Through the story you will also obtain guests to follow you and surely help you through your journeys. Though the guests only decide to pop up in battle 1/4 of the time, they still can help your party out a big way to progress through the storyline.
Overall this game is great for anybody and definatley a must have for any die hard fan of the Final Fantasy series.