I bought the Marcum Mission this year and so far happy with it. The distance and picture clarity/quality will depend on a factors such as the amount of sunlight, snow cover, water clarity and distance from your bait. I typically set mine up 2-3 feet away and can find my jigs, spoons etc. pretty easily given ideal conditions mentioned above. Fish appear quite well when approaching the bait and can actually see them lingering about. I can also pick up a 2nd jig etc if the hole is within 3-4 feet away.
It's a game changer for sure and it can get really exciting trying to get Lakers to commit or even watching their reaction.
Have fun and good luck