Don't even need to go into the details. Any escrow is a trusted third party, I don't trust any website that claims to be an escrow without me knowing them personally. LocalBitcoins escrow is a different case because it's automation and well trusted around.
I would not use any escrows that are off the forum and you haven't heard of.
Forum escrows also have a long history of scamming, thievery and major fuck-ups. Don't trust anyone without prior trading experiences with them.