I owned an LRHS 4.5-18 for a while until i sold it to pick up an HDMR II. It's quite a lot of optic for the money, though i think i'd prefer the 3-12 over the 4.5-18 less they shortened the form factor and increased the objective size. Eyebox gets a little tight at 18x. Glass was impeccable for what i paid (806$ at the time), it held it's own against my USO SN-3, CA was minor, edge to edge clarity was good, and the clicks were very good on the elevation knob. I never really tested it much in lowlight, it was on dad's SAUM for a while and he said he didn't care for it in lowlight.
Funny enough my HDMR II has pretty severe CA, more mushy turrets, and a little worse edge to edge clarity despite the price disparity. Resolution on both are very good though.