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.
In 4-5 years, it hasn't ever failed me. Live, rehearshal or home practice situation. I guess I'm a lucky boy 