The manual is very lacking compared to what Colin has said in video the solo would do. Maybe the PDF manual is basic and the in app manual will be more detailed. I have lots of questions about missions.
I have never flown the small crafts so I cant comment. It will take a while to get used to FPV. The distance is hard to gauge at least on my V+. Hoping the new Peau lens I installed on my GoPro 4 black helps that.
The Solo should be easier to see at 150' or 500' for that matter. You learn to judge the direction of the bird by how it response to the left and right stick. I can do pretty well with that. The home-lock function (DJI term) is a saver when you are not sure. I forget what 3DR calls it. Flying at distance is not an issue for me. Just keeping away from stuff is the trick