The-Digital-Picture has completed their review of the Canon W-E1 Wi-Fi Adapter, which is a nice way to get wifi functionality in your Canon EOS 7D Mark II, EOS 5DS, and EOS 5DS R without breaking the bank.
Overall, the W-E1 is a great product. For a low cost, the practically no-footprint device adds basic Wi-Fi features with the Canon Camera Connect app (and even more functionality with third-party remote control apps) to the Canon EOS 5Ds, 5Ds R and 7D Mark II. The only significant W-E1 downside is the loss of use of the SD card slot for image/video storage purposes. A great number of photographers are going to find Canon W-E1 Wi-Fi Adapter worth having in their kits and some are going to find it indispensable. Read the full review