Inefficient if you're only going to be using your ATK/THW once in a turn, as it'll only be dealing three damage or clearing three threat for 3+card, AND it's on a delay. For this to be good, you need to be using your stats at least twice in a turn, which means extra readying or cards like Go All Out. If you have enough effects like that, R&D Facility is a decent include. Just make sure your resource base supports it.
Might be best for Quicksilver or SP//dr.
For what it’s worth it targets any character, not necessarily a hero, so you can use it on allies as well. It may be worthwhile in a Voltron deck or one that makes use of ally readying effects like Command Team or Game Time. — Tzeentch144 · 9