The Silca Grinta is as good as it gets. It even utilizes the BOA system. Aside from the super high price, the only issue is that my leg makes contact with the bag often. Slightly annoying. I think they could have trimmed the narrowness a bit more to avoid contact. I didn't need another saddle bag but wanted it to match my top tube bag from Silca. Yeah, I'm OCD....
The Silca Grinta saddle bag is the perfect bag. Holds a lot of items and the straps make it secure and let me tell you it doesn't move one bit. Highly recommend.
