This is easily fixed by just sliding the phone up so magnet ...
351992
Works well. Strong magnet, phone doesn't shift at all, even over deep potholes (there are so many even the president complained). Four stars because if I put it in the middle of my phone it locks phone usage. This is easily fixed by just sliding the phone up so magnet is in contact with the end instead.
4271259
It's super easy to place, remove phone.  I placed metal piece on outside of my phone case so it has strongest hold and no issues  whatsoever.
3659962
This is THE mount to get.  It is very inexpensive and works GREAT.  The suction cup sticks to most anything.

I was concerned with the magnet.  First, the magnet is on the mount only.  The package comes with 2 metal disks to glue or just put in the back of your phone case.  This solves a worry I had about wiping out credit cards when I put my phone in my pocket.  Also, since phones do NOT have a hard drive or any other device that this affected by a magnet, there is NO danger of hurting your phone.

The best part is- you just place your phone on the mount.  No messing around with pressure adjusting counts.  It does not drop the phone.  Seriously, I am not happy I waited so long to get this.  I bought many pressure based mounts, and they are a big PITA.  This works with any phone.  BUY IT.
2933702
The magnet is easy to install in the car (insert onto a vane of the vent). It comes with small metal disks that you can attach to your phone. i didn't want to adhere the disk on my phone, so I inserted it between my case and the phone. The magnet is powerful enough to keep the phone steady (at any angle) even with the case on.

My one frustration has to do with the design of my car, not the product. The vents are obstructed by the steering wheel so I cannot easily see the phone when it's on the mount.
3639386
Good quality magnet that holds my phone in place. I love the gold color but be careful about where you place them on your phone. I have mine under the outer part of my case (Otterbox Defender style - placed on the inner plastic under the rubber outer part) which works perfect. Unfortunately, the outer part of my case has to be removed for charging (this case pushes on the charging cable too hard and causes it to bend). When I remove the outer case the magnetic on my phone is in direct contact with the magnet on the phone holder. Repeated attachment / removal has caused the magnet to scratch pretty badly. Luckily, this purchase included several so I have a replacement when I buy a new case. Of course, you do not see the scratches on the magnet when the case is on and it has not damaged the magnet ability to attach.

The larger square magnets are nice for the larger phones. I have the iPhone 7 Plus and it is a nice fit. Not too large but big enough to hold the phone securely when placed directly on it.
324210
Pleasantly surprised by the quality of this phone mount considering the low cost. Easy installation of the sticker-mounted base; worked equally well on my two very different vehicles. The magnet itself is very thin and fit easily within our phone cases, including my wife's  Lifeproof Fre iPhone 6 case. The magnet/base combo holds the phone sturdily, and there is minimal-to-no movement on less-than-perfect roads.
3460737
You put the magnet in between your phone and the case (SO you can't see the magnet it at all) then you and stick the magnetic mount on your AC thingie (and it STAYS when you pull your phone off)... YALL FOR REAL #LIFECHANGED Phone pops on and off the mount like a DREAM and doesn't fall when you hit bumps! Best $16 I have spent on Amazon in a long time!! My cup holders are free again!! LOL Yall it's the little things
1742148
I appreciate the simplicity and design of the Magnetic Car Mount Holder. The magnet is powerful enough to hold a phone securely, and the design allows for easy adjustments. The one thing I did not take into consideration is that my HTC One M8 is designed to be sensitive to nearby magnets; it and will turn off when placed near one. Placing the magnet on a different spot on the phone is not a viable or convenient because it puts the phone in an awkward and unusable position.
1583054
This mobile phone mount is really simple to use - just place the base in your auto air vent and affix the plate to your phone or phone case. Then you can attach the phone to the base and orient it horizontally or vertically. The magnet is fairly strong and this item does no harm to your car - you can attach or remove it to air vents in any vehicle. I was provided a free sample of this for my honest, unbiased review.
4563612
I made the mistake of buying one of these things that have to be rigged and worked at adding a phone.  THEN I discovered the little magnets that go in your air conditioning vent and hold your phone at the perfect height for GPS navigation.  You can get 2 for about $8 on Amazon and I LOVE THEM.  I take 3 with me for when I rent a car and forget to remove it.  The magnet is so easy to put your phone on and off I couldn't believe it.
4942383
This is the simplest way to mount a phone in your car! Installation literally took about two seconds. I used two magnets on the back of my phone so that I can change the orientation of my phone depending on my needs and I also purchased one for my husband. While we both have very different preferences for carrying around our phones, we both agree that this is an awesome solution which we use daily.
2451528
I have the usual "fixed" vent phone magnet similar to this one. From time to time, the fixed version would slide off due to the fact that the vents move". I have a 2015 honda accord sedan, and this was a big problem for me. So this is what brought me to this clamp style one.

The clamp style definitely fixed the issue of it sliding off on bumps or turns, but I had to dock a star because the magnets were not as strong as the fixed versions that I have. I have a note 3 with a phone case, so the phone is a little heavier than most. That may be my personal issue, but the only reason for docking the star is because of the weaker magnets. I fixed this issue by moving over the head of the fixed version to this Rockrok one.

Another thing to take into consideration is that the surface area of this model is a lot smaller than the fixed versions.

I would recommend this holder to people with a smaller phone like iphone 6 or samsung S5. It will probably not work well with the larger phones.

*I received this item at a discounted rate in exchange for my honest review.
3538379
Strong magnetic pull allows you to maneuver phone easily without hassling with a cord coming out of the phone directly.  The charge time is good, and the adhesion has maintained it's strength thus far.  Surprisingly small.
2830871
Hold your phone well to the magnet. My only complaint is that sometimes when I pull my phone off it takes the entire mount with it. Besides that it works fine.
2598002
The magnet has to be permanently attached to the phone. It messes with the navigation and with young kids I am concerned with them playing with the phone and putting it in there mouth.
2196531
Finally, after years of dealing with mounts that fall off the windows or dashboards, I got this very simple and unobtrusive mount for the phone and I can't be happier. It is true that the weight of the phone will cause the vent flap to come down so you'll need to find the right spot but after a minute or two of finding that sweet spot on the vent it is firm and works like a charm. The magnet exerts a strong grip and the phone stays in place and, obviously, doesn't bob up and down like on other mounts. Very satisfied with this purchase.
3360042
THe sticker was easy to fix on my phone.  Remove one side, easy afixes without any bubbles and then remove the top sticker. It easy as that.