The Halo is crap
I had the chance to take a look at one of the "Halo" models at the last gun show. I wasn't impressed. The thing not only looked cheap, but even felt cheap. Just as a quick test, I ranged it against a demo Nikon at the same table and the Halo was 18 yards off against the Nikon. I don't bow hunt anymore, but you'll never hit anything where the range is 18 yards off what you think it is.
I've got an older Bushnell 440 (not bowhunter model) that I've used for years, and it hasn't let me down so far.
Just my .02 cents worth on the Halo.