Digital Antenna Advice

[luv]

I have a co-worker who is getting ready to get rid of her cable. She's getting an Amazon Fire Stick, and she'll be using her daughter's logins.

I guess I actually have two questions which she asked me that I'm asking you:

1. Good digital antenna for receiving local channels? She has friends who have some, but they constantly say how sometimes certain channels come in spotty.

2. What can you tell me about Sling TV? I think I've heard of it, but I know nothing about it to give her any advice.