Handy Premier - TV Mounting Service (1333976)

We are buying a new 65" TV from Costco in the $700 range. We want to mount it, but I didn't realize how crazy expensive mounting services can be, and I don't want to pay $300+ the cost of a mount for a $700 TV. Costco obviously has the best price ($99.99), but their reviews are hit or miss. People seem to be most frustrated by scheduling issues, which is annoying but worth the gamble for me because I work from home so I'm around all the time. Wondering if anyone can instill some confidence in me using them. Have you used them to mount your television, and did the installation go okay? I'm most concerned with the installation being done properly/ holding up! Thank you!