Terry,
I have been using the Twister series rests for over a year now. I used the original prototype on my Liberty from last February up through this past January. Now I have retired that one and am using a Twister Safari on my Allegiance.

IMO, I think this is the best hunting drop away on the market....The rest operation is silent, it's accurate and reliable and the full containment makes it a no brainer.

It's my favorite hunting rest that I have owned to date. No staff anything, no ties to the company, just a favored product.
I have played with quite a few others, but the rests I have USED for hunting immediately prior to this one going back to 2001 are the TT Shakey Hunter, and Muzzy Zero Effect.

Search the word "Twister" in the tech forum and you should find quite a bit of reading on it.