Stake: no slippage, no capacity limits, instant, adjustment rate applied.

Unstake: no slippage, no capacity limits, requires ~4 days, no fees. See docs: Unstake Lifecycle.

Swap (buy or sell): slippage, instant, swap fees, available at multiple venues. See: Swap Venues.

The minimum stake amount is 0.02 ETH, and the minimum unstake amount is 0.01 ETH. For amounts smaller than the above, see available CEXs and DEXs on the Explore page.

See the latest tutorial: mantle blog

See the technical docs: https://docs.mantle.xyz/meth