Everstone is offering two different mounts in this listing. I own both so will review both. They are both good, possibly even great - especially for the price - but the smaller one does not really properly support the claimed 66 pound load limit - more like 10-20 pounds max. Details follow.
As an aside, It's noteworthy that over the past few years it's become very difficult to trust the Amazon ratings, reviews and the Q&A - mostly because of sellers listing multiple devices in one listing while the reviews are combined across those multiple items. commingled such that you never know who is reviewing what, and the Q&A may or may not apply to the item you're considering, unless the seller mentions which one was purchased. Also, sellers change their listings and frequently the reviews and ratings no longer apply to the current product - yet all the irrelevant reviews, ratings and Q&A remain in place. So it's getting fairly difficult to know what item reviewers are really talking about. For example at this moment on Feb 12, 2020, this listing states 575 customer ratings. No matter which item you select (the 23-55" mount or the 23-70" mount), you can page through the same 373 reviews. If you look carefully at the "verified purchase" line above each review, you can see which item the reviewer is said to have purchased. But the ratings and Q&A are completely commingled so it's tough to discern what folks are talking about.
Add to the confusion on this listing is the various ways that the maximum supported weight load is listed in multiple places (which disagrees with the supplied instructions as noted by other reviewers), and the lack of mention of each mount's model number, then making a good choice can be confusing.
On to the reviews.......
The 23"-55" model: This is the smaller one, selling at the moment for $17.99, it states a maximum load of 66 pounds. The instructions I received with it call this a model ARL188S5-ES and those instructions also state a maximum load of 66 pounds. This is a nifty and simple little mount, but there is no way you want to hang 66 pounds on it. I used it for a year on a 55" samsung TV that weighs 45 pounds and every day I wondered when it was going to snap off and tumble down. With 45 pounds on it, the swing arms bend downward, especially when extended. Worse than that, as several other reviewers noted, the tilt control refuses to fully lock in a flat position. The result is that you will always have the TV angled down a bit no matter what you do. The tilt adjustment is also a bit loose at the bottom, such that it slides backward against the stops, and I mitigated some of that by placing small pieces of coat hanger wires so that the bottom of the tilt bracket was forced up to its stops and bringing the bottom frontward a bit. Still, the result was a TV angled somewhat downward, and a fear that the bracket would break at some point. More recently I re-deployed this on a small 32" TV that weighs about 11 pounds it works perfectly for that weight.
The 23"-70" model: This is the larger one, selling at the moment for $29.99. The listing description says it supports a maximum load of 110 pounds but the enclosed instructions - which call this larger model an ARL435M-ES - state a higher maximum load of 132 pounds. This is a FAR sturdier mount than the smaller one, and it works perfectly for my larger 65" LG that weighs 47 pounds.
Both mounts include all the screws needed and extension plates needed to cover nearly every size of VESA mounting hole spacing and hole sizes. Good instructions, and both mounts also articulate well, making it simple when changes to connections are required, or when you want to swing the TV for alternate viewing angles. The small one retracts to get the back 3" from the wall, and the large one retracts to about 2" - which leaves the average large TV screen about 5" to 7" away from the wall - which in my experience is about the best you can do unless you buy a thinner TV and a much more expensive mount and/or install the mount recessed into the wall.
Hope the info helps someone! Happy viewing.