Rondo of Swords plays a little bit differently than most strategy role-playing games. For one, when you move a character they can attack more than one enemy at a time. They can attack as many enemies as are in their area of movement by running passed them (for the melee fighters, magic users and archers attack from a distance). This is handy because you can take out more enemies more quickly, and it's a big plus as the game is very difficult.
The game also utilizes the touch screen quite well. You move your characters around it with the stylus while the top screen displays the character's status. It is intuitive and fun to use.
Another plus is your characters don't disappear if you they are injured in battle (unlike Fire Emblem). They stick around, although they are wounded for a while. However, you can still use them.
My biggest grip with the gameplay is the level of difficulty. In most levels, unless the prime directive is too kill all the enemies, it is better to work your way through as few as possible. In many cases, you must keep Sedric alive for the entire campaign or you will lose. So, while you need to level up to get more powerful, it is extremely difficult to do if you want to actually pass the level. Also, the rules for the AI seem different than they are for the player controlled characters. The AI's archers can shoot arrows way out of their range, while the player controlled archers can't. It's this amount of unfairness that make the gameplay downright frustrating.