Things I liked: I like the zoom range, the AO parallax range, and the smaller objective lens size - see more details on this below. This is probably the best scope available for rifles that shoot at 700 FPS or less, or routinely used for shooting at 100-feet or less.
Things I would have changed: Nothing! I'm very surprised this isn't the most popular scope PA sells. Peanut gallery comment: why bother with the more expensive Illuminated Reticle (IR) version of this scope?
What others should know: Many air rifles now come with a 4-12x40 scope (or just a straight 4x). Why? It's a lot easier to offhand shoot at 2x than 4x. If you need 4x or more, you have it available, plus the 2x gives you a much wider field of view. Next: we all know that an adjustable Objective (AO) is necessary for air rifle shooting distances. Contrary to what PA says; my Hawke 2-7x32 has a minimum parallax adjustment of 15-feet, which is great for shooting indoors. Finally: while 40mm and 50mm objective lenses look cool (and are great for dim conditions), they can cause an exit pupil problem in brighter conditions. The smaller 32mm objective lens doesn't let in as much light, so the exit pupil "black cloud" effect is much less under typical daylight conditions. Another peanut gallery comment: PA reports that this has a wire reticle. In my experience, wire reticles can be fragile in magnum springers. Hawke's Airmax line is probably better for these.
Things I liked: Much more rewarding to shoot at than paper. A good value.
Things I would have changed: A bigger version would be nice. This one is kind of small, but not bad.
What others should know: All the other reviews are right on. Stay within its limits and it's fine. Surprisingly, it's not very noisy for indoor use. I'm glad I bought it!