Understanding the Mass

I honestly didn't think I would be interested in studying and understanding the Mass this soon into my seeking.  But, the more I listen to Catholic radio, the more I hear the apologetics, the more I read the Catechism, the more I pray, the more I blog about all my wandering thoughts about all of this, the more I want to understand what the Mass is, what it isn't, and what it entails, and why.

I was told that the Mass is wrong because it is about "crucifying Christ over and over again."  I also heard that the Mass is a time-machine of sorts, spiritually transporting the participants back to the Last Supper to partake with Christ as if the participants were really there.

Ummmm.....yeah.......not really buying that last one.  I can accept the Eucharist, I can accept the reason and purpose for the Mass, but I don't buy the whole transporting back in time and place thing.