Super Mystery Dungeon was a pretty good game, and I would definitely give it a shot. I only have two issues with it.
1.The Story isn't as well done as Explorers of Sky in my opinion, and I like Sky 100% better.
2. There is absolutely 0 post-game. You do one short story line and that's it. Once you beat the game, there's no reason to play it anymore.
However, there are definite upsides to the game.
1. The battle mechanics are better and more balanced than other games, and the new mechanics added are wonderful.
2. While the story may not be as good as it could have been, it is still well written and absolutely worth playing.
3. The graphics are A++
4. The updated Questing/Rescue mechanics are just wonderful.
So overall, yeah you should definitely play through it. It's a great game to play overall, and my experience with it was simply great.