That's another story. I sent UNO coins to mintpal and next day ~~~*poof*~~~
Another way to test exchanges is what I did with coins-e to buy DEM. I sent a low amount of BTC, converted into a few DEM and sent it to my wallet. Everything worked fine. Then I sent a larger amount, exchanged and withdrew without problems. Always send very few even to trusted ones, just to check how it works at that moment.
If you want, I can send you a series of emails I have exchanged with Coins-e, for several coins.
I have lost DEM, EMD, ORB and a couple of other coins, fortunately the amounts were relatively small because I was testing them.
Problems 3 months old, not only they haven't been resolved, but they also stopped responding to me.
No, I am not putting even a fragment of satoshi there