I've gotten away from low power variables due to shitty eye boxes at magnification. I've had multiple PA prisms because of this, but not the 1X.
The 3X will have a considerably better eye box than the 5X, but I feel like the magnification is too low for that reticle. It also only comes in red, and green is immensely better for my aging eyes. Dare I say the 3X didn't feel like 3X past 25 yards? I don't know if that makes sense, but is probably a representation of my eyes I guess.
I love the 5X. I wish the glass quality was better, and the eye box is only 7mm, but this thing combines to become my favorite prism optic. The green illumination is a huge deal for my eyes. Anything red triggers my astigmatism, and it's brighter. Rapid transitions from 25 to 50 to 100 yards off hand, it left the red dots and low powers in the dust.
As to up close work, shut the front cap with the illumination on and use it like a red dot. Seriously. It's off a couple inches at 25 yards, or about where I'd prefer magnification if I needed it more accurate than that. This is another area where the 5X shines. The reticle is "smoother" for this, and it has less POA/POI deflection than the 3X when using it occluded. It's not going to outperform a red dot in speed or accuracy up close, but it will be faster than with the cap open.