I cannot recommend the Boss WL20.
Mine had so many dropouts that I returned it and got another one. It was the same. I had the receiver attached to the mic stand, so it was like half a meter away. As soon as I separated a little, it failed. I only use it at home now. I do around 50 gigs per year. Most of them open air.
Then I got a Xvive and it works much better. No dropouts.
Previously I had line6 g30. Works on batteries, so...
I got the G10 and I love it. So much, in fact, that I got the G10S. It was horrible. Obviously defective. I returned it the same day.
As I like the "virtual cable" thing, I'd like to try the Sennheiser XSW-D, but I think it's a little too big and it looks like the flexible parts fail.