It is my understanding that this mount works for several Samsung TVs. We used it to mount a 55" Q7. We had not wall-mounted a TV before. What I didn't expect was how much it appeared to open up the room by moving the TV 8-10" back from the top of the stand to the wall. Properly installed, it appears to be very secure, at least for a set of this size. I might hold my breath hoisting a 65" up there, but Samsung says it'll work, so...
If you are not mechanically inclined, or at least familiar with the general construction of your wall, go ahead and pay for installation. With the weight of the TV, this mount MUST be firmly attached to studs. There are slots for other screws, but you have to have the load capacity of large screws directly into wood. The other mounts are for stability.
You will need: A stud finder, level, drill, screwdriver. I also used a laser level to find where I wanted the center line of the TV to be, and then to mark the position of the top line of the bracket.
The instructions are...not good. Mostly they are pictures, and if you don't know what you're looking at, you may have to spend some time decoding what the pictures are telling you. What they depict is the various relationships between the mount, the screw slots and the studs behind the wall, telling you where you have to put screws. Once you have that sorted, you should be good. You'll need to know where you want the top of the TV to be. The instructions then tell you how far down from that line you'll want to place the mount for your particular TV. There are stabilizing screws that mount into the TV to allow you to adjust the angle of the TV (top-to-bottom) and have that angle stay put. The instructions for those are pretty much non-existent, but there are walk-throughs online that will help you get a picture of what you're doing. You won't need those if you mount the TV "no gap." One of the under-trumpeted features is that you can tilt the TV on the mount to get it level; that's a real bonus, as it makes your precision mounting the bracket to the wall a little less critical. This mount isn't cheap, but given the security and flexibility of how it works, it is 100% the best way to wall-mount these TVs. Good luck!