I made some orders and overall it's working well HOWEVER, one order for selling 100 feathercoins just went missing when placed and I can't cancel the order (ie. the feathercoins have gone from my balance and the order is in limbo). I contacted support and have been waiting a week with nothing yet. Coins just disappearing isn't acceptable and is likely bad programming/design but as they are a small team and in beta I will wait some time longer for them to respond.

Also it's impossible to keep track of transactions as they don't log the ones that get actioned by the other party (ie. somebody buying your sell order.)