Wonderful.
I'm a huge fan of the original Lux Aeterna song, so for much of this review, I'll be comparing this song to that one.
I noticed a few changes -- none of them were really detrimental to the song, and in some cases, by the way you remixed the song, it really made it sound nice.
I wasn't really sure what to think when the more techno-style beat came in at 1:24. I sort of have mixed feelings about techno in general, and I think the reason why I enjoyed it was simply because I love Lux Aeterna so much in general. :P
I didn't really enjoy how you sort of started to warp the background part, the more traditional sounding part, to match the weird techno you had going, but it still worked out in the end. It did sound interesting to put it bluntly, but it was nothing bad enough to dock points for.
At 2:40, you got back to the more traditional sound of the song, and even added in a small chorus in the background.
I enjoyed the instrument that came in at 3:17 -- the synthesized sound. It really meshed well. The instruments also really meshed well at around 3:35 when you brought in the higher sounding instrument, and it fit the bill perfectly.
I enjoyed how you ended and began the piece on a more traditional sound -- though a bit more echoed than what was in the original song, it really made for a nice loop.
What impresses me most about this submission is that you manage to keep the relative sad, but beautiful tone of the original throughout this piece, even when the techno's blasting at full sound -- and, to put it frankly, I'm impressed. This is truly good work.
(I'm trying to review the ones you told me were good now -- so far, so good. :P)