I have 2 of these (sticks) plus an older AC Roku. The stick is good, it does all the media stuff the older Roku does. I'm pretty sure this is what I found about it's wifi capabilities. My stick wasn't getting my wifi at my one television location. So I moved my old AC powered Roku there and it did pick up the wifi that the stick couldn't. The stick can use standard usb chargers (it doesn't have to use the television usb charger). The stick gets a little hotter than I'd like for as big as it is.
I purchased the roku streaming stick about a month ago. It was so easy to set up and has been just as easy to use. I love it and would definitely recommend it ....