The benefit to SANmp is that volumes show up as locally attached storage to the OS, in effect there is really no difference to the OS/applications with a SANmp volume vs a local hard drive. There are a few applications where this still matters, it used to be mainly for Pro Tools users; but if you’re running Pro Tools 10 or later this won’t make any difference. It doesn’t matter for most applications (FCP 7, FCP X, Adobe, Avid, etc.). The website say’s it offers ‘SAN’ connectivity, which is true from a technical standpoint; but I don’t believe (and haven’t seen) any data showing that this is any faster than setting up a network share with the same hardware.
Keep in mind, I work at ProMAX, so I am partial to platform; that said we do offer a complete turnkey storage solution that is all in one box and very easy to manage. Price wise it will end up about the same as if you do it all yourself with a mac mini, thurnderbolt storage and all the extras you need. Here is a little demo of how it works https://www.promax.com/s-238-platform-manager-software.aspx
If you have any question please let me know.