Already use an AKG system for gigs, but was intrigued by the plug-and-play design of this system. Its brilliant, even round the house I use it - just plug one unit into any amp , and the other into any guitar and you're away. Its so easy just to swap from one rig or guitar to another, easier than a cable in my view!! I havent noticed any appreciable change in sound between ordinary cable & this radio so thats a plus. I've used it for several small gigs without issue - of course the freedom of being wireless goes without saying - but the added freedom this has to quickly switch guitars between songs is a bonus. Charging takes about 2hrs, but they last for more than a gig, usually around 5hrs. For quality I've deducted a mark because the first unit I returned because , altho they performed well, the leds didnt indicate as quoted. The replacements had a similar problem, but given the convenience of the unit I discussed and settled the issue with Thomann to mutual satisfaction. But I've had mine in continuous use now for around 2 months and they are great to use. Recommended.