Matthew wants to know if he can bridge two Airport Extremes, put them 300 feet apart and still get a signal. Leo says it's no problem, except for the distance. 300 feet is a long way for 802.11,b,a,c, which max at about 150. 802.11AC, though, can go about 300 feet. One thing he can do is use a directional antenna from one to another. A new Airport Extreme, though, will work. Leo advises sticking with the same company's products to make the extension.
Ron is buying his wife a new laptop for their anniversary and he's looking at a Lenovo which has AC Wi-Fi. He doesn't think his router can handle it, since it's pretty old. Leo says that routers do wear out and the AC router will give him better reception and speed. Every four or five years, it may be necessary to get a new router.
Andy has a cheap N router and wants to know if his connection would be faster with an AC router. Leo says no. AC is actually faster than the Internet connection itself. It works for AC enabled hardware and in-network transfers, but it won't really make his internet faster.