I've used some other Silca products before and liked them but this is a total fail.
MOSTLY GOOD I like the BOA connection, though it doesn't hold the bag far back on the rails as shown in the pics. No matter how hard I cranked it down, the bag slid down the rails till it rested agains the seatpost. Not a deal breaker, but I prefer saddlebags that sit as far back as possible so I don't brush them with my thighs.
SO-SO Internal organization. It's a rounded clamshell, which does look cool, but it's not the most efficient for storing stuff. Rectangular and boxy isn't as sexy, but works better IMO.
COMPLETE FAIL The zipper is a useless piece of crap. After just a few rides it's almost impossible to open or close. I've resorted to scrubbing it with a toothbrush but it's simply not usable. If you never ride in wet or dirty conditions you may have a different experience but I think Silca needs to go back to the drawing board on this one.