I bought both the stick and ROKU 3, they work great I use one in living room and one in bedroom .The ROKU 3 has a USB for a hard drive. I use the computer as server and can watch on either stick or base unit.
I've had the roku 3 for some time and wanted a cheaper connection for another TV. Works just as well. Sometimes there's a delay but I think it's due to my wifi and not the roku
We decided about 1 month ago to cut cable. We were nervous at first but now can't imagine not having our Roku Streaming stick. The ability to select channels makes this an economical and terrific option for any family. We only wish that there were more free TV channels (ie Fox, ABC, Comedy Central, etc). Some channels limit their content unless you pay. If saving money is your goal, be mindful of what channels you have otherwise you may end up paying more than you did with cable. We're set with Netflix, Hulu, and Sling TV.
I have owned my Roku StreamingStick for two years. Never had a problem and was so easy to set up. I've recommend it to several friends and family members who are now enjoying theirs as well. Thank you Roku!!