Hello i will share my personal experience and feedback here when use Alex Testnet
unwrap from stack to eth complete after 1 hour everything was good, and wrap from eth to stack more faster its about 10-20 minute
everything is good keep working on it for better in the future.
Stacks Address : { STA4SWJ6SQNX2CY5REQPVD867SHVG37WFV38JTNC }
Metamask Address : { 0xAFbFC76dE4Dc1ACe2702bc3556Efbc57b2F89830 }