I've been enjoying the improvements of SACD in my system a lot recently. I have purchased mostly classical and jazz recordings. I've found the improvements in sound to be significant, both 2 channel and multi-channel. I especially enjoy multi-channel when done right. Some of my more often played SACDs are Spyro Gyra, James Talyor, 1812 Overture (to name a few). I was excited about the new Stones release of Forty Licks, it has just about every song that I could want. Unfortunately it wasn't released in SACD, so I purchased Hot Rocks as well to get the improvements that SACD can make. I've read many positive posts about the improvements in sound quality that the SACD layer has over the redbook on HR. I opened Hot Rocks and played the redbook layer first for my wife and I to have a bases for comparison. I then played the same track with the SACD layer and heard no definite difference. I did this with most of the songs on both HR Cd's and didn't notice a significant difference with any of them. When playing the redbook layer through my Marantz 8200 I used the Source Direct feature that I find adds life to most if not all of my Cd's. I find the SACD layer to be over hyped. I'm very disappointed in my purchase of Hot Rocks, and wish I could be refunded my money. After many SACD purchases I have come to some conclusions that work for me. I will no longer buy single layer 2 channel SACDs. I will be very picky when buying multi-channel SACDs that are not hybrid, and 2-channel hybrids. I have found that the multi-channel layer of SACDs is often more involving and more enjoyable to listen to. I also find that if I can't play the disc in my car or bedroom system then the SACD is a poor value for my money. I agree with other members of this forum when they say that all SACDs should be multi-channel hybrids. If you don't like the multi-channel version then don't play it, but at least you have a choice. My decision has also been backed up by the re-release of some 2-channel SACDs in multi-channel versions. I just wanted to share my feelings on Hot Rocks and SACD in general in the event that I can save anyone else a disappointing purchase. Any comments on the Stones SACDs or the poor selection of multi-channel hybrids is welcome.