We use a proprietary software that we specifically designed and coded in order to download websites from Archive.org. Sure, we could tell you exactly how it works but do you really want to know all the technical stuff or do you just want a Wayback Machine download service?
Our software is able to grab most of the content and links from archived websites. We cannot guarantee that we can grab all content because there are too many variables that could be present that would prevent us from being 100% successful with ALL content on ALL sites, 100% of the time, it’s just not possible. However, we are very successful in getting most content and our rebuilds are nice looking. We do offer a money back guarantee on Wayback downloads but not on re-builds or conversions because that is all done manually, by hand, by real people and they deserve to get paid for their work.