Best USB Wi-Fi adapter to buy?

So... I could also use a little help with this one. I'm trying to figure out if this is actually worth picking up?

http://www.amazon.com/usb-wireless-adapter...gousbn150.aspx

Dell is a solid company and they make decent networking gear. Personally, I’ve had some pretty bad luck with those tiny WiFi cards that don't have external antennas—or even the option to add one—so right now I’m sticking with this: http://www.amazon.com/wireless-adapter-802-11ac-dual-band/dp/B01N6T5YV2