@Rollin Hand: Mossman (Ed) and I both got a Lekato WS-80 2.4 Ghz units about 2 years ago (there was a promotion back then, basically 2 for one, so Ed got one and gave me the other).
Budget units, of course, and I´m careful to not let them drop or anything, although they´re not thin paper either, just being careful with them.
I don´t think I can tell the difference between an average and a premium cable or average and premium wireless system since all I´ve ever used is low to average equipment, but they sound good to my ears, and compared to the old cables I had, I think they sound the same.
I´m definitely happy with the convenience and ease of use, freedom of movement. Of course, I only use them at home, in the same room, and they work perfect. I just once did test some distance and went to the other room and outside and they still worked well.
How long will they last, or how long will the battery retain more than 4 hours of continuous use? I don´t know. It's been around 2 years since we got them, and they're still lasting the same amount of time before needing to charge up.
In those 2 years I haven´t played regularly; sometimes I played all week, sometimes not. Sometimes haven´t even played in months, so I think they don´t accumulate too many hours of use, at least not 730 continuous days, but they're still going strong to this day.
I think the Joyo and Lekato and Getaria and other units are basically the same gadget under different names; you have 2.4 and 5 GHz option. There are many to choose if you just want to try them for a while without spending too much.
So, for me, they have worked very well and I´m very pleased with the convenience of use. Haven´t played much really for the last 3 months, though.
My Lekato are like these ones: