What an interesting program. Gaining 3 or 2 cards while doing something you were going to do anything is very welcome. This effect is good enough that you might consider throwing this card into any deck in which you have some free MU/deck space. You won't guess right often, but if you guess right at least twice during the course of the game, I think the slot was worth it. It is free to install after all.
So how often will you guess correctly? Most corporate operations cost between 0 and 5 to play. Most agendas cost between 2 and 5 to advance. Rez cost varies between 0 and 15 but typically will be between 0 and 8. So I'd tend to name a number between 2 and 5. Hopefully you'll get it right a couple times a game.
This card of course shines in conjunction with a couple other cards. If you know what you are going to access then you are good to go. You almost never know what you will access from HQ, but there are ways to gain insight into R&D. RNG Key will likely be an auto include in Adam decks to complement his Find the Truth directive (on further consideration, this will work as long as the first run isn't against HQ). Sunny too will enjoy this program in conjunction with Globalsec Security Clearance. And Geist usually has memory to spare. So this works nicely with his Spy Cameras. 3 or 2 cards 5, 6, or more times per game is pretty insane. I'm looking forward to trying it out!