If you have any experience with this rest, please let me know:

Do you have the 300 or 400?
Do you like it?
Is it quiet?
easy to tune?
What arrow shaft and type fletch (ex- helical feathers) are you using?
Does it give adequate fletching clearance?
How accurate is it?
How is it' s arrow holding ability?

Thanks for any input you can give to the cause

I will chime in, even though you know my experience.
I have the Zapper 300, and honestly I do like it. I was having a little trouble with it, but after some help here and a talk with the company, I think I may have the problem solved.
I am shooting CarbonAero Excel 400s with straight fletch. There does seem to be a slight heli, maybe 2 dg. There is no problem with vane clearence with mine. And, I can pretty much rotate the bow all the way around without the arrow falling off.

Glad to hear they got you straightened out

Anyone else?

I shoot basically the same arrows as woody. I have the 400 and truely like it. I shot a nice 10 point this past fall at about 8-9 yards and felt comfortable with the arrow fully held in place. I drew at about 7 or 8 and he never heard it, so I guess it' s quiet enough. The guy who always sets up my equipment is an old friend who has been in the business 40+ years and he thinks they are pretty slick too. " If" there is any noise, it is cured with a little clear finger nail polish on the four stainless steel tips.