Clean, simple, elegant, strong.
Easy to make a set from as well if you like that sort of thing.
Not everyone made bars and cranks and hubs and QRs etc.
Ie. Ringle only made stems and posts and hubs and QRs and a few other bits, Control Tech only made stem, post, bars, forks, cantis, QRs etc.
Thing I've kind of lost my point here really, but essentially I'm trying to say that Syncros made a nice set of matching controls which can be used to make a nice simple-looking buld without relying too much on mixing manufacturers.
Again, if you like that sort of thing...
Personally I prefer Control Tech stuff, but it's not as abundant and therefore not as easy to make a one-set match from...