There's only few details about the slippage rate. They just that they will spread the slippage to available DEX when Metamask liquidity was depleted. The problem is there are approximate value displayed for the maximum slippage before swap confirm? If there is, this will be good because user will save tons of transaction because they only  charge 0.087% as fee.

I will try to access my metamask later and this feature seems promising if they can minimize the slippage rate.