I was in need of a single arm wall mount because the beams in my wall were 24” apart. Also i needed it to be able to hold a 65” TV.  This mount was advertised as such and so far it has been doing the job. If installed correctly i believe this mount should hold up jus fine. Fyi- with mounts like these make sure u are drilling in the center of the beam. I would suggest drilling small holes side by side through the dry wall to find the edges and middle of the beams in your walls. 
Totally pleased with this find. If something does go wrong i will create another review!