compared to Notoriety and Freedom Through Equality, it's so much more value in terms of click compression since it's a 0-cost run event. sure, there's a downside if you don't make it in, but there are lots of common ways to make sure it works
tons of really useless expose effects (very likely not worth using them just for this though)
but every faction except Apex (rip) has a way to leverage a run on R&D specifically:
Adam: Find the Truth
Anarch: Medium (more risky, and very anarch)
Criminal: Spy Camera
Sunny: Globalsec Security Clearance
with Freedom Through Equality, you'd use any of the above tools, then pay 3c and a click to play it, then make your run.
with Mad Dash, your next click is just the run itself.
i think it's best for Shaper and Adam, two factions that could use the support right now. that's probably why i'm most excited for it. it doesn't really help the top tier decks as much as it helps ones not in the meta right now.
@Lttlefoot's point is valid. it doesn't really need to exist if you're just camping remotes, but The Source works well to help secure that the corp tries to score in a remote, which again helps Adam a lot.
overall, i think it's great against Food, since one Mad Dash/Notoriety/Freedom is often the last point you need