dore_m Just to clarify, you must download and install them via the Vienna Assistant, keep for however long you want, but then use the iLok to activate the license to start the 30 days?
(I don't see an option to download and NOT install in Vienna Assistant)
You don't need to download right away - once you claim the demos on the VSL site, they'll show up in your Vienna Assistant as "Not Installed." From there, you can download them to your hard drive whenever you choose to, and activate the iLok demo when you want to start the 30 trial period.
I would assume that once the demos are added to your Vienna Assistant, you would still be able to download them after the initial trial period is over, but I don't know this for sure - might be worth clarifying with VSL.
I downloaded the entire series at once so that I could compare them side-by-side in real time, but you have to have a lot of free SSD space for that.