Almost identical to the level 0 version of Stealth, for 3 XP you get an additional Agility icon, and Finn Edward's ability to Evade as a free action once per turn. This is further bolstered by the - 2 evade, making this a solid pickup. 3 XP might seem like a lot, but any enemy with an Agility of 2 or less is automatically evaded, unless you draw the auto-fail. Yet another benefit is that seemingly ever present inclusion of "a non elite enemy.", is missing from the card. This means you potentially can evade some big elites, turn after turn. It can also be used aggressively with Waylay, if the investigator can take it, potentially turning Waylay into a 1 action kill, or with Sneak Attack, for a cool 2 test-free damage. Might be overkill in a Finn deck, but also turns him into a pretty great dodge tank with just a bit of support. I personally think it's a great card, with a lot of potential.
During your turn, exhaust Stealth: Evade. The chosen enemy gets -2 evade for this evasion attempt. If you successfully evade the enemy, disengage with it but do not exhaust it. Until the end of your turn, that enemy cannot engage you.
This card is going to have a second life with Kymani, the evader’s evader. The tricky thing is, this card isn’t for the first evade you do a round; it’s for the second. That one doesn’t matter if you exhaust an enemy, because they’re exhausted. Combined with the police whistle, it might feel that the grappling hook becomes secondary in many cases. (It really depends where clues are versus enemies on the board.) Still, a +2 and a free action for something you want to do almost every turn of the game in multiplayer, hard to beat.
(There’s also a combo using stealth on your nemesis weakness or the Guardian of the crystallizer, because those enemies won’t engage anyone else, even if you leave them in a room with three other investigators!)