Bellow is the router I was looking at getting... Would this be a good choice for a family who uses the Internet every second of the day?
1. The router you selected is exagerated for your home network. You can get an excellent TP-Link router in the 20 - 30 USD range. Look for it in any computer or discount store. I have at home one of these, used by at least 10 different devices
2. You can check if your modem works correctly connecting it directly to a computer through LAN port. All computers, desktops or laptops, have a LAN port.
3. If your current router presents some problem, you can take it to a computer repair service. I had recentlý a problem with my router and the only problem was the power transformer. The technician sold me a new one for 2 $ and didn't even charged anything for "repair" it.