Pretty surprised the reviews for this are mostly lukewarm/negative when this is one of my favourite cards ever printed and is extremely fun. It essentially thins your deck by up to 6 cards per reshuffle, because you are saving 3 actions drawing the cards (if you find them in a search) and you get 3 bonus draws from the successful tests. In reality you might fail the tests or draw the card, but if you put some thought into it you will be thinning your deck by at least 4, and usually 5 or 6.
You do need at least some search support to make it work, but a lot of search cards are already very good and once you have even a handful of them in your deck. Cards that you might run anyway that also give you search synergy here: Practice Makes Perfect (anyone), Eureka! (anyone), Bewitching (Trish, Parallel Skids), Guided by the Unseen (seekers), Research Librarian (tome users), Arcane Initiate (Luke).
If you're already running some of these cards, which I frequently am, then Surprising Find turns into 1 xp for a 15-20% deck size reduction. Huge value. Compared to Astounding Revelation it's also more useful when you draw it because is better than . If you have enough search then you can even run them alongside each other, but devoting 6 cards to search payoffs does make it hard to fit all your other cards.
Overall just a really good and cheap way to smooth out your deck and get to your good cards more quickly.