First of all, it does not come with any instructions, so you will have to come back to the 鶹 page and use the pictures on this page to assemble it. Imagine giving this as a present. The person would feel puzzled upon opening the box as to how to assemble this mount. All we needed was a single piece of paper, really. The initial confusion can be increased by the extra parts they included for seemingly no real reason unless they have little faith in the durability of their product. Since you have no instructions, you wonder if you assembled this mount the right way since there's extra parts left, because there's nothing telling you those *are* extra parts.
As a matter of fact, they're probably right to doubt their own product's durability: the whole mount is made out of very cheap, very light and stiff plastic and you can't help but think that any form of physical activity while wearing this greatly increases the risk of breaking it easily. So, the extra parts probably will come in handy at some point. The straps, however, seem to be of rather good quality and they can stretch well if you don't want to adjust their length, making the mount comfortable for your upper body even when it's really tight on your sides and shoulders. The whole thing is also practically weightless ( indicator of the cheap plastic I mentioned ). You will pretty much almost only feel the weight of your device.
Now, for the actual mount. The first thing you will notice is that it has two huge design flaws. The first one is the holder which is actually a vice holding the phone on two sides instead of its four sides. This of course implies tightly screwing the vice so your phone won't slip out, but it also involves slightly crushing your phone - it's a vice after all. Most responsible people will use protective cases for their phones. When you make the vice's grip too tight, it'll cause your case's protective screen to "bump" out from your phone, making it difficult to use its tactile features because it'll now be all wavy. If you lessen its grip, you'll notice your phone may move a little, causing you to retighten the grip in fear of seeing your phone drop to the ground because of a lack of grip.
This could've easily been avoided if we had an "X"-shaped holding rubber strap like other models instead of a vice grip. However, you could circumvent this problem by using a few high endurance rubberbands and maybe a bit of superglue . It would not look very cool, but it could do the job and ensure that your phone is totally safe without having to squeeze it too hard. It all depends on what kind of activities you plan on doing while using this mount. If you just walk around and talk, chances are you don't need to worry. If you go mountain biking in the rockies, you may want to reconsider the safety of your phone when using this mount.
The second and major design flaw with this mount is that they made it without prioritizing the ensuing additional weight of the actual phone once the customer buys their product. Therefore, even when you screw it as tightly as possible with your hands, your phone holder will drop forward because of the poor design of the AEE adapter and J-type quick plug base ( refer to the pics for those ). Of course, they added a little tool to work around this ( probably a knee-jerk move after designing this thing and realizing the flaw ), and with this little plastic key, you can tighten the screws enough so your mount won't fall forward. However, it's not very practical for this mount, which is an item you will use while doing outdoor activities from walking to running to riding motorbikes, to depend on this extra item that you could lose anytime ( yes, even with that little red band they added ).
An easy way to prevent this would've been to replace the key with a lock on the actual mount to keep the holder from moving at all unless you wanted to. You could then unscrew or unclip the lock and move your phone according to your desires. Unfortunately they did not think about this.
Overall, I am not very satisfied with this product, but I will use it to test it further. I will update this review if it breaks or if I find other issues with it.