In 2013 The Roost was successfully crowd funded via Kickstarter.com. I was lucky enough to stumble upon the project. It was an easy sell; I jumped on board and backed it.
The Roost was a unique product. It folded flat for easy transport and converted to a laptop riser like a transformer (sans sound effect). The Roost lifted the laptop at the hinge point. It would wedge itself at the hinge and the base of the laptop would sit on the lower crossbars. There were four contact points: two at the hinge area and two at the base.
The Roost version 1 with a MacBook (2010).
The Roost version 1 with focus on the hinge mount area.
There’s a slight flaw. None of the four contact points have any traction. It is smooth plastic or smooth resign material. This left the laptop to The Roost mount a little squirrelly. Any sudden jarring (like a bumping of the table or nudge on The Roost/laptop) and the laptop would come off the hinge (literally).
Fast forward to 2015. The Roost comes back with a version 2 offering. Since I backed the original Kickstarter project, I was notified of the second project. I was still using (and liking) The Roost (version 1), but I also liked the redesign of the 2nd version.
The Roost version 2 still used four contact points, but it no longer used the hinge as the main anchor/support. The main support will fall on the base of the laptop falling into a C (it’s more like a “G”) channel. The channel/groove has a rubber-like grip to it, so the laptop is more secure. This resolves the issue I had with the fist version. 
Another addition to the redesign makes the second version adjustable in height. There are three locking positions in which to set the laptop. You can pretty much get it to a position to meet your ergonomic needs. The original version was not adjustable in height.
Now let’s discuss the bad. There is a little hazard when adjusting the height level. You need to depress the white trigger to unlock the height setting. If you’re not careful, you can pinch a finger (or two)… and I did (check it out on the video).
The second flaw is the C/G channel in which the laptop base sits in. From the looks of it, The Roost version 2 was designed to fit laptops of a specific size. I’m guessing 2014 MacBook Pros and smaller. I’m still using a 2010 MacBook (the last plastic kind before Apple changed to an all aluminum body). My MacBook is fatter than the current Apple laptops (current MacBook, the MacBook Pro line, and the MacBook Air line). It barely fits. For fatter laptops, like my Lenovo G505, it kinda fits. The G505 does fit in the channel, but it has an awkward tapper shape that dislodges from the channel when trying to adjust the height of The Roost.
The two flaws that I found in The Roost version 2, can be avoided by the user. The fix is to not mount the laptop until the desired height is set. Do not try to adjust the height when the laptop is mounted on The Roost. You can, but you have to be aware of the finger pinch factor, and if your laptop is a little fat, be aware that it can get unseated from the channel during the height adjustment.
Overall, I dig The Roost. I was happy with the first version. I’m even happier with the second version. For more info go to: http://www.therooststand.com/
