Holy crap, this remix is AMAZING. I may be a little biased, as I love the rock genre, and I love the source song, but this is such a well done piece of music, I have have no choice but to give it praise. I particulalry like how well done the part at 2:00 is done. The guitar solo from 2:20 to about 3:00 is great, also. The drums are intense, the guitars are awesome, and the remix as a whole is just crazy.
On another note, the ID tag included with this song introduced me to Dracula Battle Perfect Selcection, and DB2PS, two incredible Castlevania rock CD's. I can't express how wonderful this remix is for being a great song and having a great ID tag.