You can read exactly how Ainge crushed it here:
I'm happy with our return for sure, but chenaren's got a good point - if GS just moved Douglas for Crawford+Brooks they got a pretty sweet deal too, especially since they're all expirings.
nothing wrong with both teams winning in a trade.
Miami saved a bundle of money with lux tax factored in, so it's arguably a win-win-win.
Not a complaint about GS, though, they're my favorite non-Celtics team and this should give them even more firepower.