Bottom Line: If you're not a fan of bullet hell or shmups in general, R-Type Dimensions certainly isn't going to change your mind. Similarly, if nothing makes you happier than threading your way through quick-moving enemies and monolithic bosses, then this is right up your alley. Just like you knew it would be.
Recommendation: Even if you're an R-Type fan, give the demo a try before you thinking about coughing up the absurdly steep price of 1200 Microsoft Points. If you're the impatient type, or are easily frustrated, do yourself a favor and just turn right around and walk very quickly in the other direction.