The first game in the eXceed series, describing the gameplay probably doesn't matter as much as the fact that you probably won't be able to play it without a third party fix (or several).
That being said, it's good albeit a bit basic. You can graze enemy projectiles to charge a powerful special attack which I find specially noteworthy.
Overall, I wouldn't recommend buying this one on its own, but if you get it in the bundle containing the entire series then I guess you could consider it a bonus. Nevertheless, I applaud the labor of the people who took the time to fix this so we could play it.