I use a DH Labs Glass Master Toslink between my Technics SL-G700 SACD player and SU-G700M2 integrated as it simply sounds the best. It's the only cable that plays all of my CDs, beautifully. The Lifatec and Unique Products (Amazon) Toslink cables (and a few other generics) had drop outs on a few of my CDs, leading me think there was something wrong with the CDs. Also, two different lengths (3' and 6') of Unique gave completely different presentations, the longer being more robust and fuller sounding.
The same thing happened when I tried out a Coax made by a recording engineer I know, a Zu Audio Mission, a Audio Envy and a couple other generics. The same CDs simply wouldn't play properly. That, and the RCA outs bested all of them.
The sound quality of the DH Labs is simply head and shoulders above the others. No contest. Not even close. I don't see why Toslink gets such a bad rap.
All the best,
Nonoise