I got the 7-10 power ones from leupold this year. the switch works fine, and they focus pretty clear, but they are pretty stinking dark in low light. i would like to try the 10-17 power and see how much the 42mm objective helps, but the little 32mm on mine is too dark.
when it's light out they work great, i've used them next to lieca geovids, swaro el's, and some other $1k ish bino's, and they are all better in low light. during decent light, i do really like mine.
i really like the switch power, but they lack a lot in low light. I got them because i had some other bino's that broke and i just upgraded to these so i didn't have to pay that much. i think i would be disappointed had i paid full price.