From where do you get that kind of opinion ? I've been using it for a month and a half now and it's solid really.
Had so many deposits, withdrawals, sells, and everything went through ! Not even a single transaction got stuck.
What do you mean by stuck anyway ? It's either a problem with the contract itself, or nothing. It's actually working great. I'm not saying it's perfect. The owners should actually make it a bit faster but other than that nothing.
It's a decentralized exchange and no bad has control over your funds and you can trade ANY erc-20 token that pops up. What more would you want from an exchange ?
I've been using it for about a month now and it's been an awesome experience. I lost lots of money in the BTC-e seizure (and previously in the Bitfinex hack). It's such a relief not keeping funds on a centralized exchange!
I've never had a "stuck" transaction. Maybe he meant a transaction to take an order that does not exist anymore (ETH transaction will be made but no contract execution). Or maybe they cancelled an order which still shows on the book -- this is usually a browser/cache issue and funds can be verified on the blockchain.