In Standard that's pretty great, you get three cards for the price of one
If you choose the rebound, your deck will not be shuffled
Despite being to cast, Koma's worth it thanks to its ability to continuously make tokens while protecting itself
You can't put a Teferi's Moat out there for a long, long time against decks unknown with the knowledge that an enchantment removal or bounce spell will almost certainly kill you unless you are very brave, and once you start down the Moat road it's hard to stop
They not only ramp you in up to three colours, they also have the exalted keyword, making your creatures an itty bit more effective when they attack alone.
And until then, that brings this discussion on gaining life to a close