Unstoppableswap are way overpriced 5-6% fees and now capacity 0.12 BTC per atomic swap maximum.
Besides that they are only 3 providers of atomic swap inside, for Samourai i have great hopes because everyone will be able to broadcast an offer it will have so much offer that the % fee will get reduced by the internal competition of atomic swaps.
There is an other nice project that i am waiting to see released is: https://serai.exchange/
It will be similar as thorchain swaps but for XMR paired with BTC LTC ETH DAI