I have a 60" smart tv. I have always had trouble with it buffering. I now use the roku 3, no problems. I cut the cable cord November of 2014 and I have not regretted it!?i have Hulu, Netflix, cbs access, feeln, and several more stations. I did try the Firestick but to me it was not user friendly. Seemed like everything that came up, I had to pay for. I had Amazon Prime. Go with Roku, you will love it.
Worked fine the first couple weeks then all of a sudden it would reset 5 min after start up. Done all the resets and yet still resets, maybe it's a flaw with the stick. Quit using it all together to save the frustration.