Salloyd-Any mesh system should be superior to an extender, but there's lots of variables. First of all, what is your speed you're purchasing? What's the measured speed on a Deco SpeedTest? And what is buffering? Streaming movies on Netflix perhaps. Is the buffering device Wired or wireless? I pay for 400mb, and get up to 470. I wouldn't get buffering running that download speed, but I've seen my speed occasionally drop to 10-11 and that could be a problem with Netflix HD or UHD. More information would be helpful for those of us on the forums to be able to help you.

I use Plex as my home media server. I have a Roku box in the living room. I had my video files on my NetGear ReadyNAS Duo. It's an older version of the ReadyNAS and far as I can tell, it doesn't support gigabit network speeds. Anyways, I attempted to stream an MKV movie a few days ago but it would buffer every couple of minutes and the buffer times were a minute or two each, so it was just unwatchable. I assumed the NAS was the bottleneck so I moved my video library to a local drive on my PC but the issue remains. The MKV in question is a 1080p BluRay rip - a 2 hour movie that's about 4.5GB. Plex Kodi Lucky Patcher