Like any other exchange just use caution.
- Do NOT use the exchange as your wallet.
- Do your trade and withdraw any coins you're not willing to lose.
While the folks running the site could have the best intentions sh*t happens and it could blink out of existence at any time and take your coins with it.
Just Google ltc-wallet.com to see what can happen.....everything seems lagit for a period of time and then *poof* gone forever.