Great for a while, but then died mid-performance.
I paid for an expensive performance mic, the XD-V75 system. At first, everything was great. We practiced weekly and played out once or twice a month. After a while, I started to notice the backlight not working when it was a little colder than room temperature, then the display would start to not show, making it hard to mute or know if it was on or off. Once it warmed up, the display worked better. Then it started cutting out in the middle of shows, with fresh batteries for every performance and LOTS of battery life left. It was as if I was hitting the off button while performing, so I changed the way I was holding it, but it was happening more and more frequently...in the middle of shows. I dealt with it, turning it back on immediately, but it was not cool. Finally, in the middle of a practice, the microphone turned off as though the batteries were dead (not unexpected, using up the show batteries during practice). However, once I put new batteries into the mic, it would not turn back on. I tried several sets of fresh batteries to no avail.
I bought the system four and a quarter years ago, so maybe that is just the life expectancy when you use it for a hobby? Still disappointed, though. When I needed to get a new mic stand adaptor, it took me almost six months because support for and through Line 6 is awful. Now that my mic is not working, I talked to a local repair shop and they told me that if they need to order any parts from Line 6, or get any assistance from Line 6 at all, I might as well forget about it. I guess I need to find a new, different system to use!