I use it as my main wireless mic for weddings. You can use various incarnations of AT branded mics. I also think there is a Sony for the interface. Mine has been flawless. I've never dropped audio. I've also been fortunate not to have to seek a different frequency due to conflicting frequencies. But, it's very good to have ability to switch frequencies as necessary.
Just make sure the 9 volt battery leads aren't pushed back too far. If they get that way, the battery can lose contact. Just bend them back up.