I'm surprised there's no review for Boto, so I'll leave one. Because Boto is excellent. 6 str, 2 ETRs and a third mean subroutine? Sounds like Brân 1.0 to me!
Of course, Boto here requires Threat 4, which means it's not quite there from the get go. Getting there isn't too too difficult; Regenesis on a 3 pointer is one score, two of Nisei MK IIs and/or Sisyphus Protocols ade fine since they're also amazing agendas to score. But if the Runner is stealing agendas, it could take a while, and it has some minor anti-synergy with Punitive Counterstrike decks that want to run only 3 pointers (but I feel like those decks are often on Regenesis anyways).
On the other hand, it can't be clicked through, so the face check 2 damage is quite mean, and it keeps that resilience to Boomerang. Trashing from hand is a non-issue for the most part; Jinteki has cards like Mindscaping and Charlotte Caçador to refuel quickly, and it can even get pesky spare agendas out of the game to be scooped with a Spin Doctor or Longevity Serum back into R&D. It also turns on cards like Jinteki: Restoring Humanity or Cohort Guidance Program.
And the break numbers? Propeller eats 2 counters before the Threat text and 3 after, so due to this card (and Bran 1.0 splashes) Shapers have to be very careful with where they spend their power counters. Those Tatu-Bolas or Border Controls suddenly are way more taxing. Cleaver breaks for 3/4 before the K2CP Turbine rig of doom comes down... oh wait it's lategame and the Threat text is active, too bad (granted, Leech or Ice Carver can save 2+ credits). Manually breaking with Curupira is an expensive 6-8 credits, but be careful where you put other barriers as Boto is a prime target for the power counter skip. Just be careful around Arruaceiras Crew Devil Charm decks. Crocodiles do not like gangsters coming in and blowing them up.
Tl;dr, if you have something to protect, there are few ICE in the game more efficient than Boto. Play it in any Jinteki deck with a score out plan. You can't go wrong.