The review doesn't really have an easy-to-excerpt summary.
They had an increase in high-impact career plan changes in 2018:
We’ve tracked over 130 rated-10 plan changes over our history, so we think our programmes can reliably produce this level of plan change.
Over 2018, we decided to focus on producing more rated-100 plan changes, which involve larger shifts into more senior positions, where we estimate they’ll approximately result in 10-times as much counterfactual impact.
Typically, when we ask donors and researchers in the community to place a number on the value of a 1-3 year speed up into one of these positions, they estimate these kinds of shifts are equivalent to over $1m in additional donations by the community. There are many issues with this method, but if our rated-100 plan changes indeed involve a speed up of this magnitude, it suggests they have value to the community of around this level.
We recorded ten new rated-100 plan changes this year, compared to ten over our entire previous history since 2011. About half of these seem to be significantly driven by content and in-person advice that we think is similar to our existing programmes (as opposed to personal contact with our founders, a source of impact which may not scale as rapidly with marginal funding).