Want something simple?
I would recommended the Netgear Arlo Camera kit.
I got one of these before they were released as part of the netgear beta testing I was selected for it and have a 2 camera kit with base station.
Installations a doddle as its wireless.
Range - seems to be better than the homehub2AC in regards to cameras pairing up at the bottom of the garden a good ~20m away
Ease of use - very simple. Its app based for ios/android so access is very simple.
Push notifications are good (a bit too good when getting 40 motion activation's due to the dog!)
HD video. Good quality HD video with night vision. If you wish to see what the video quality is like, the following URL is a good start :
https://www.youtube.com/watch?v=OQVyxzKh9OM
Ability to share videos on a URL to friends, family, others without downloading and uploading to a source or storage area.
Strong Magnet : held on with no issues during all the storms we've had in the last few weeks. I was dubious, but they have proved me wrong.
Cameras can be camouflaged if needed by means of the covers that are on sale. I find the white blended in with the awings of our roof so when insitu its hard to see the cameras are there.
The downside to using these are as follows ;
They rely on your ISP being on as they are wireless. If your ISP drops or your connection dies you can't monitor or see/use the cameras
They use CR123A batteries (4 per camera) : Depending on usage, activation's, recording lengths etc I get roughly a month of power before they need changing so have 16 batteries from ebay to rotate to ensure they're always powered and ready to use.
basic package only gives 1 GB of space and 7 days recordings. If you wish to have more space or recordings over a longer period, you have to sign up for a package but if your good on logging in and deleting/moving the recordings then I find that the basic package is okay for this.