Lyman peep sight for Benjamin 392?

[His lordship.]

When I had my last Benjamin 392 pellet rifle in 2009, I considered getting a rear Lyman peep sight for it, several of the customer reviews had criticism about how annoying it was to adjust for the proper sight as the mounting screws had to be turned to adjust for windage/elevation, etc.  I see that shooters have used it in some of the photos in books and magazines, so it must not be too bad.
 
I bought another 392 and am considering putting one on.  Are they really as good as some have said, or as poor as a few critics have noted?

If it has worked for you, any tricks to mounting and using them?
 
Thanks.

[shooter6br]

Just got a Williams 5p-SH for my Benjamin 392. Does not have screw adjustment of elevation but I got one since they are hard to find. I use a red dot on barrel mounts .Midway for $35

[goodconcretecolor]

I put peep sights on a 397 ten years ago and my son wants me to mount peeps on a Marlin 336 he plans to buy soon as he has great confidence in the peep sights from all the squirrels he has taken with the Benjamin. No trouble at all with the sights.

[His lordship.]

I put one on and have been happy with it, wish the aperture was a little larger for those quick shots.  It gives a longer sight radius compared to what came with the gun, I probably would get another if I had 2 Benjamins.