I bought 2 of the UV-5R radios during Amazon's Prime Day. I know a few folks that have them and to my knowledge haven't had problems with them and like the cost and abilities they have. Even if you never use it to talk on, it makes a very wide band scanner to listen to all kinds of things. Couple things I'd recommend, get at least one battery extra per radio. 2 or 3 would be even better. Also get a better antenna. I found this one and it works much better than factory stock.
https://www.amazon.com/Authentic-NA...KY5XS67TN6S&psc=1&refRID=RWAD52D80KY5XS67TN6S
As far as number to get. For me that minimum is 2 per person in household. You each got a back up in case one breaks. Also in a bad situation, severe storm, etc you can listen to 2 different channels each. Cover a lot of ground that way. I bought mine to keep in our cars for use in our GHB's. I keep my other non chinese radios at the house. I have both Yeasu and Kenwwod HT's that have given many years of service.