I have only used the 702 once before. I didn't love or hate it, but I believe it only takes up to a 1080 input, so that could be very limiting.
I have had the extreme displeasure of using multiple Atomos monitor/recorders. They've always felt off to me, and I hate the scopes on the monitor. I have never been confident in shooting with them.
In a similar price range, I would highly recommend the Odyssey 7Q/7Q+. You can usually find them reasonably used, and they are a fine piece of equipment (once you learn the menu structure). I love the scopes included on the Odyssey and the adjustability that lets you see even the most subtle nuance. You can load tons of your own LUTs on and I've always been really happy with the look of the monitor.