This is my first sight purchased for my first weapon... If I knew then what I know now, I would do things differently.
I mounted the sight and magnifier on a PS90. The PS90 has a length limited upper rail. Furthermore the stock PS90 had to be modified; stock sight removed and replaced by an upper rail. This had the effect of raising the upper rail by ~0.25" vs. a factory PS90 Triple Rail weapon.
When using the magnifier it was not possible to rest my chin on the weapon. I am uncertain, how this affects marksmanship. I am uncertain if this is normal or related to its mounted position and whether the increased rail height was a factor. With the magnifier flipped to side I was able to rest my chin on the weapon. The sight just seems huge, especially for the PS90 although it works well (including daylight).
Changing the "Flip to Side" mount (Quick flip) for a left handed shooter only requires a screwdriver (large) and reversing the magnifier. Unfortunately, this places the Quick Release Lever on the right side, which interferes with its placement. The magnifier and holographic sight cannot be (left hand) mounted flush as depicted in related images. This increases the overall length.
The combination sight and magnifier adds almost 24oz. to the weapon and is ~10.75" in length Comparatively the Leupold Mark 4 CQ/T adds ~18oz. and is 8.8" in length.
Pros: Easily installed and used
Cons: Almost too big and too heavy for a PS90
This review was written in the old system and had content requirements that are different than reviews written today.