Learn something: Nothing in life is "safe". But you can buy one if you really want to 🙂 However, like i said: If you have the opportunity to test one in the store, go for it.
I would recommend a firewire interface, but that's totally up to you. Many here would recommend the Apogee Duet, but we've heard of broken devices there, too. I myself have a broken Alesis that needs multiple plug into USB / pull out of USB to start up, but once it works, it is great. I used an Edirol UA-25 EX with great pleasure and usually work with the Tascam Fireone.
To test the Thing, connect a dynamic mic and record something with the Gain knobs turned to full gain. Listen to the hiss. Listen to the soft background noises of the room you are testing in (maybe cough or tell something far away from the mic, hear a car passing by or so). Buy the one with the least hiss while having clear and crisp background noises.
Fox