I've been on Jepps since AsA made the format change to their publications. Whatever gripes there are about Jepps service or performance, it beats the hell out of AsA. About 2 years ago they had a problem with one update due to one of the links in their distribution chain. Recently I have found them a little less reliable, but I'm sure its actually Australia post because other mail like subscription magazines and invoices have become similarly unreliable.
The Jepp publications have a common line of logic through all its documents that is absent in the AsA documents and unlike AsA (as demonstrated by the format change) they test their formats extensively in the real world before implementing changes.