I have been using the Jack V3 for almost 8 years at several hundred gigs, sessions and rehearsals. And not once - not even for a second - has it let me down.
And not only that. The Jack doesn't sound great, no, it sounds like it's not there. It reproduces the signal from my guitars very neutrally and compared to a high-quality cable, there is no difference to be heard. Maybe a very small amount of attenuation in the high mids, but this can be corrected with a minimal correction in the presence of the amp. When I play live with the band, however, there is really no difference to be heard.
But I have total freedom of movement, can even go into the audience and even in larger venues I have never had a problem with the range. The issue of latency is also not really an issue. Stageclix says it's under 3 milliseconds. I have that even when I'm standing just a meter away from the amp. So that's simply not an issue.
Even on stages where there is a lot of technology with WiFi, the Jack doesn't have the slightest problem thanks to its 5.8 GHz. I've never had a wireless system that did its job so stably, sound-neutrally and unobtrusively.
One battery charge lasts for about 4 hours and if I forget to charge it before the gig, I simply plug the transmitter into the receiver during the break between sound check and the show and even just 20 minutes is enough for a complete set.
The very compact receiver has a fixed place on my pedal board and doesn't have to be placed anywhere else.
I recently had a technical problem and a few questions that Stageclix support answered with unique speed and competence. My emails from the evening were answered by the morning of the next day at the latest. And the Stageclix team was very empathetic, patient and competent. For that alone I give it 5 stars.
Now after 8 years with the Jack, the battery is running low and, based on my very good experience, I've decided to buy a completely new set. It's not cheap. But it's definitely worth the price.
Helmut