I've been searching for the right client solution for quite some time. I have deployed, seemingly, every "client portal" solution out there. I was not only frustrated with the results, but my non-technical associates could not figure out how to properly use what took me days to implement!
DAS took no time configure and was so intuitive that even my 68 year Video Editor was able to upload a video and push it out for approval. Now THAT'S a solution worth implementing! I liked it so much, in fact, that I purchased all of the extensions and have a complete Client Portal solution, once and for all.
Spencer Labadie (one of the Slick ReMix Developers) was also quick to help out with a slight snag I had on my end. He was on top of everything minutes after I posted a question in their forum.
I'm currently using this to get my Company's videos approved by Clients all over the world. It is flawless for this purpose.
In short: Solid solution for getting your designs approved. The other solutions cannot say that.