John, you'll have to let us know how that meat you're having tonight was. Most times I cook my roast in the oven on a lower temperature.. 300*... to cook slow and tenderize. It's surely hard to beat it done that way... and am not sure the expense of a Super Wave or Nu Wave could improve it.
I did read reviews...and found lots of negative ones.. If I bought one from a store that allowed easy returns... I might gamble on it...but don't want to be stuck with something I don't like.
Happy RVing all!
Joella