I have 2 6.5-20 50mm Vipers w/ target dot reticle. I do not own a PST yet, but most likely will in a couple months time. I got the regular vipers at a killer price and have been happy with them. They aren't as clear as my 6-18x50 1" tubed swaro it replaced, but close. At dusk, dawn and shooting into light, the Swaro is in a completely different class. I do prefer running a balistics calculator and turrents over the TDS reticle. I don't expect the PST to be on par with the Swaro for dusk/dawn, but hope its an improvement over my regular vipers.