Did you do a search? I think this has been covered quite extensively, even recently in fact.
But anyways - - it's hit or miss with Soma's. Some people like them and other people find them totally a waste. I get an ok buzz from them and I only take them when I'm out of something good (like opiates - though they mix well with opiates). I generally take 2 or 3 and get an ok buzz that usually makes me fall asleep within an hour or two. I wouldn't call it a euphoric buzz though.
Probably not a total waste, but there is alot better stuff out there.